Huawei cloud computing ie interview notes – what are the backup networking modes of ebackup, the main application scenarios and backup processes of each backup networking mode?

Time:2022-4-28

Application scenario:

LAN base is generally used in scenarios where the amount of backup data is small and there are no special requirements for the backup window. In such scenarios, the backup server and backup agent are generally deployed by virtual machines.

LAN free is generally used in scenarios with large amount of backup data and strict requirements for backup windows. In such scenarios, backup servers and backup agents are generally deployed by physical machines.

For example, in the fusionstorage scenario, the backup agent is directly connected to fusionstorage through the storage plane, and obtains snapshot data from fusionstorage according to the snapshot information for backup.

 

LAN-BaseBackup networking

 

 

 

LAN base backup process:

Control flow:

① The administrator creates a backup task in ebackup and sends the backup task and backup policy to the backup server (backup management plane)

② The backup server obtains the virtual machine list (production management plane) through VRM, and sends the backup task, backup strategy and virtual machine list to the backup agent (internal communication plane)

③ The backup agent issues an instruction to VRM to back up the VM. (production management plane)

④ VRM issues instructions to cna, which creates a snapshot of VM. (production management plane)

⑤ After cna completes the snapshot, it returns the snapshot information (SCSI number / WWN) and cna host information to the backup agent. (production management plane)

Backup traffic (heavy) and recovery traffic

① The backup agent scans the SCSI number to check whether it can access the production storage (storage plane)

② If the backup agent finds that it cannot access the production storage, it requests cna to send VM backup traffic (production management plane)

③ Backup agent writes snapshot volume data to backup storage (storage plane)

Backup control flow and backup data flow go through the front-end LAN network, and production storage is virtualized data storage.

 

LAN-FreeBackup networking

1. Production storage is virtualized storage

 

 

 

LAN free backup process:

① The administrator creates a backup task in ebackup and sends the backup task and backup policy to the backup server (backup management plane)

② The backup server obtains the virtual machine list (production management plane) through VRM, and sends the backup task, backup strategy and virtual machine list to the backup agent (internal communication plane)

③ The backup agent issues an instruction to VRM to back up the VM. (production management plane)

④ VRM issues instructions to cna, which creates a snapshot of VM. (production management plane)

⑤ Cna returns the snapshot information (SCSI number / WWN) and cna host information to the backup agent(Production managementPlane)

⑥ The backup agent scans the SCSI number to check whether it can access the production storage (storage plane)

⑦ If the backup agent finds that it can access the production storage, mount the production storage (storage plane)

⑧ Backup agent writes snapshot volume data to backup storage (storage plane)

Backup control flows through the front-end LAN network, backup data flows through the back-end San network, and production storage is San equipment.

2. Production storage is fusionstorage

 

 

 

LAN free backup process:

① The administrator creates a backup task in ebackup and sends the backup task and backup policy to the backup server (backup management plane)

② The backup server obtains the virtual machine list (production management plane) through VRM, and sends the backup task, backup strategy and virtual machine list to the backup agent (internal communication plane)

③ The backup agent issues an instruction to VRM to back up the VM. (production management plane)

④ VRM sends an instruction to request FSM to take a snapshot (production management plane)

⑤ FSM sends instructions to FSA, and FSA sends them to leadervbs for snapshot (production management plane)

⑥ Leader VBS sends snapshot information (SCSI number / WWN) and cna host information to VBS in the backup agent(storagePlane)

⑦ The backup agent scans the SCSI number to check whether it can access the production storage (storage plane)

⑧ If the backup agent finds that it can access the production storage, mount the production storage (storage plane)

⑨ Backup agent writes snapshot volume data to backup storage (storage plane)

 

Note: if the production storage is fusionstorage, the snapshot is taken by FS itself. Fusionstorage agent and VBS need to be installed on the ebackup server.

 

Backup window refers to the time spent on data backup of business data in the business system when the business system normally used by users is not affected.

*Ebackup features?

 

 

 

Mainly re delete compression and breakpoint continuation.

*Ebackup backup storage and production storage requirements: (test)

Production storage: 1) virtualized data storage (snapshot by file system on CNA)

2) Fusionstorage (you can take snapshots by yourself) 

Backup storage: shared file system is required (shared storage is required: multiple backup agents can read)

CIFS

NFS in NAS

VIMS # San (shared) → VIMS (file system))

LAN base backup process is that both backup control flow and backup data flow go through LAN network. It is suitable for scenes with small amount of backup data and no special requirements for backup window.

LAN free backup process is that backup control flows through LAN network and backup data flows through back-end San network. It is suitable for scenes with large amount of backup data and strict requirements for backup windows.

Backup window refers to the time interval of data backup when data is backed up without seriously affecting the application using the data.

Backup storage can be fusionstorage (volume mode, which is actually similar to San mode)

The backup media needs to be shared. Lab uses local hard disk because there is only one backup agent, but it still needs to be formatted as the file system VIMS of the cluster

*What is the difference between LAN base and LAN free in ebackup?

1. Backup stream: LAN base adopts business management LAN network, and LAN free adopts private San network.

2. Impact on production host performance: LAN base has a great impact on production host performance.

Because LAN base traffic is sent from the storage to the host, and then from the host to the ebackup backup agent

3. Transformation of the existing network: LAN free needs to get through the storage planes at both ends, and the transformation of the existing network is large.

*LAN base networking and its advantages and disadvantages (tested)

 

 

 

LAN base networking, in which the data transmission is based on the network. One server is configured as the backup server, which is responsible for the backup operation of the whole system. The backup medium is connected to a server. During data backup, the backup object transmits the data to the backup medium through the network to realize backup

Advantages: 1 Make full use of the existing network, save investment and centralized backup management

2. Low requirements for equipment

Disadvantages: 1 Occupy large existing network bandwidth

2. Limited backup performance

3. It has a certain impact on the host application

*LAN free networking and its advantages and disadvantages (tested)

 

LAN free backup system is based on San (storage area network). San based backup is a solution that completely solves the problem that traditional backup methods need to occupy LAN bandwidth. It adopts a new architecture, takes the backup media as independent optical fiber nodes, and the data flow is no longer transmitted through the network. It is a solution without occupying the network bandwidth (LAN free).

Advantages: 1 Little impact on existing business network

2. Good backup performance

Disadvantages: 1 Increased investment in networks

2. High requirements for equipment

3. Impact on production host performance

*What data does ebackup back up? (tested)

1. Description information of virtual machine

2. Disk file of virtual machine

3. CBT file (none when the production end is FS)

*Differences between the two backup networks:

1. Different networking methods: LAN free needs to open up the network between production storage and backup storage, but LAN base does not.

2. The backup and recovery data flow goes in different directions: LAN base goes through the production network and LAN free goes through the storage network.

3. The cost is different: LAN free needs to transform and open up the storage network, and the cost is high; LAN base makes use of the existing network and has low cost.

4. Impact on production host: LAN free has little impact and LAN base has great impact.

5. Requirements for production storage: LAN base requires virtualized storage, LAN free virtualization or fusionstorage

The biggest difference is whether to open up the storage network and whether to transform the existing network.

*Ebackup agentless VM snapshot backup (test)

1. Support online backup without stopping the business of virtual machine

2. Reduce or eliminate the impact on virtual machines by installing snapshots on virtual machines

3. Support VM block level incremental backup / recovery, greatly improve backup / recovery efficiency and shorten backup / recovery window

*Does ebackup backup storage support fusionstorage? (tested)

Fusionstorage is usually mounted through the pool. This method is not supported by ebackup. If it is mounted to the ebackup server by mounting volume, this method can be used. Ebackup will think that it is mounted by San, so it is supported, but it is not necessary.

Ebackup restrictions:

1. Template virtual machine and linked clone virtual machine are not supported

2. Disks not mounted to virtual machines are not supported

3. Backup and recovery of virtual machines including fusionstorage volumes and virtualized storage volumes are not supported.

4. When the backup server and backup agent are deployed in a virtualized environment, backup of the virtual machine where the backup server or backup agent is located is not supported.

5. VRM cannot be backed up

6. The maximum support of a single server is 64t (a single server cannot install more hard disks during integrated backup)

Networking mode of ebackup and their respective backup processes

LAN base and LAN free networking diagram is whether the storage plane needs to be connected. No other difference.

 

 

 

1. Issue a backup or recovery request on the backup server

2. The backup server forwards the request to the backup agent through the internal communication plane,

3. The backup agent forwards the request to VRM through the production management plane and asks him to take a snapshot

4. VRM forwards the request to cna to make a snapshot of the disk and generate a CBT file

5. After taking a snapshot, send the snapshot result to VRM, and send the iSCSI ID to VRM

6. VRM is forwarded to the backup agent to realize the communication between the backup agent and cna (because the backup agent knows the SCSI ID of the production storage below cna, it can directly read the snapshot of the production storage)

7. Map the production storage to the backup agent, and the backup agent will mount itself

8. The traffic of backup data is sent from the production storage to the backup agent through the storage plane

9. The backup agent stores the backup in the backup storage through the storage plane

 

LAN base backup is adopted, and the transmission of backup and recovery data is based on Ethernet. In the process of backup, the backup agent transmits the backup data to the backup storage through Ethernet to realize backup.

LAN free backup is adopted, which does not occupy Ethernet resources for backup and recovery, so as to release network bandwidth.

Draw a diagram to illustrate the backup architecture of ebackup

 

 

 

 

 

Distributed backup architecture, consisting of 1 backup server + n backup agents

The specific backup agent module of the backup server is used for both management and backup

The backup server communicates with the backup agent through the internal communication plane

Why is backup storage shared storage?

Load balancing to achieve failover. Ebackup requires multiple agents to access the same storage.

Panorama of backup solutions

 

 

 

Panorama: integrated backup centralized backup virtualized backup

Integrated backup (< 36tb), ready to use, batch replication, integrated, suitable for scenarios: SMB local backup, small branch local backup.

Centralized backup of data center (> 36tb) mainly focuses on the backup project of large particle data center, which is suitable for scenarios: local backup of data center and centralized backup of multiple branches.

Virtualized backup is applicable to fusionspere and VMware virtualized environment backup

What is snapshot technology?

Snapshot is a complete and available copy of a specific data set, which contains the static image of the source data at the copy point; A snapshot can be a copy or a copy of the data reproduction.

Definition: short time} complete recoverability

1. Full copy snapshot

Advantages: ① independent of the original volume; ② the fastest recovery speed; ③ the best read-write performance after snapshot

Disadvantages: ① the storage cost of snapshots is high; ② during snapshots, the write action is affected; ③ the number of snapshots in a short time is limited

Record the write operation. If you execute it again according to the log, it will be refreshed to the latest state (aggregation action A-A ‘- a’) will be recorded directly

A-A’’)

 

 

 

2. Differential snapshot

Implementation method: (continuous data protection)

Cow copy on write} advantage: no impact on read performance

Disadvantages: write performance is affected for the first time

Row write time redirection} advantage: no impact on write performance

Disadvantages: potential impact on read performance

Advantages: ① low snapshot cost ② continuous snapshot

Disadvantages: ① relying on the original volume, the original volume fails, and the snapshot is unavailable; ② the recovery speed is slow; ③ after the snapshot, the performance is affected

Common snapshot technology categories

Full copy snapshot

Differential snapshot

Cow: copy on write

Row: redirect on write

Random write (WA: Write Anywhere)

Implementation of cow

Cow, copy on write, when a new write operation is executed:

First, read the current data of the address to be overwritten by the write operation

Save the read data to a dedicated space and index it

New write operation execution (write destination address)

Implementation of row

Row, redirect on write, read and write operation steps:

New writes to the source disk are logged (and indexed)

When reading the source volume, retrieve the log first

When reading a snapshot, the source volume needs to be referenced

When the snapshot is cancelled, the write log must be fully executed to ensure that the data status is updated synchronously with the source volume

Backup mode of snapshot

Full backup} advantages: fast recovery, independent of other backups

Disadvantages: high backup costs

Differential backup} advantage: lower backup cost

Disadvantages: recovery is slow and depends on the first backup

Incremental backup} benefits: lowest backup cost

Disadvantages: the recovery is the slowest and depends on other backups

Basic mode of backup technology

 

 

 

What is ebackup?

Huawei’s virtual machine online backup software

It can support fusionsphere, VMware virtualization platform, and the new version supports KVM

What is ebackup? What are the characteristics?

Ebackup backup software provides data protection for massive virtual machines in fusionsphere and VMware virtualization platforms, and provides relevant functional and security features.

 

Ebackup backup process

 

 

 

Ebackupserver sends backup instructions to VRM and ebackupproxy to tell them to start backup. At this time, VRM will take a snapshot of the original disk of the virtual machine and generate a differential disk. The new data will be distributed to the differential disk. The original disk is only read-only, and the agent will read the data in the static original disk and back up the disk data to the backup storage, The generated CBT files will also be backed up to the backup storage by the backup agent. After the backup, the snapshot will be deleted, the original disk will be merged with the differential disk, and IO will be normally distributed to the original disk.

。 Who took the snapshot of ebackup? Who notifies the backup agent that the snapshot is finished? Who notifies the backup agent to copy data? How does the backup agent copy? Where do you put the copied data? Where do backup instructions exist? What is stored in backup storage? How is IBASE called?

If the production side storage is virtualized storage, take a snapshot of the specified VHD file through VIMS. If the production side storage is fusionstorage storage, fusionstorage takes a snapshot by itself; After the snapshot is copied, CNA notifies the agent that the data is copied; The backup agent copies data at the production end through ports 35000 and 35020 of HTTPS; Copy the past data and put it in backup storage; The backup instruction is stored in IBASE database, which stores the backup data and CBT files; IBASE is called by the web server through the reset interface provided by IBASE.

Reasons for ebackup physical deployment

Take LAN free as an example. Ebackup needs to read the storage on the production side. At present, Huawei’s virtualization technology does not support the direct connection of HbA cards to virtual machines, so ebackup needs to be physically deployed.

Ebackup 4 network planes

1. Backup management network: the portal management interface for user clients to access the ebackup server

2. Production management network: used to connect ebackup to production site resources (vSphere, fusionsphere)

3. Internal management network: used for internal communication between ebackup server and ebackup proxy

4. Storage network: the communication plane between the backup server, backup agent and the storage plane of the production end, and the backup and recovery data transmission plane based on LAN free mode; Data transmission plane based on file level recovery (FLR); The backup server and the communication plane between the backup agent and the backup storage.

Why can’t ebackup back up raw device disks?

RDM storage is non virtualized and cannot be snapped for this type of storage, so ebackup backup cannot be used

Ebackup physical deployment or virtualization deployment? Which scenarios must be physically deployed and which must be virtualized? How to deploy VMware?

Ebackup can be deployed physically or virtualized.

Scenarios that must be physically deployed include:

 

 

 

Scenarios that must be virtualized include:

 

 

 

 

 

What is the backup principle of ebackup? (what is the difference between CBT adopted by ebackup and snapshot?)

 

 

 

 

 

CBT technology distinguishes incremental data or differential data by recording version number of CBT file

CBT technology also calls row snapshot technology, which is used to freeze the data during backup to ensure data consistency

Snapshot technology uses row to freeze the data during backup and record incremental data for the next incremental backup.

What is the principle of ebackup recovery?

 

 

 

Ebackup backed up cna nodes?

If LAN base networking is adopted, the control flow and data flow will pass through the CNA node. If LAN free networking is adopted, the control flow will reach the CNA node and the data flow will not.

Can I take a snapshot after the Lun of Huawei V3 goes up?

If the Lun of V3 is formatted as virtualized storage, you can take a snapshot. If it is formatted as non virtualized storage, you cannot take a snapshot.

Can ebakcup only back up a single file on disk D?

No, ebackup backs up all disks of the virtual machine by default. You can exclude disks, but you cannot back up a single file on the disk.

Where is the backup strategy for ebackup created?

Select the backup policy on the navigation bar and click create.

What are the components of ebackup?

In terms of the whole backup scheme, the components of ebackup include production side virtualization environment, production side storage, ebackup backup software (server and agent) and backup storage.

From the perspective of ebackup software architecture, ebackup includes maintenance terminal browser, web server, IBASE database, backup server, backup agent, backup storage and DB.

What forms of back-end storage can ebackup backup take?

SAN storage and NAS storage. Considering that the LUNs of SAN storage are difficult to expand, it is recommended to use NAS storage for backup storage.

What did fusioncompute and ebackup do during backup?

Fusioncompute is responsible for receiving backup and recovery instructions from the ebackup server and taking snapshots

Ebackup is responsible for sending backup and recovery instructions, backing up production data and writing it into backup storage.

How to implement permanent incremental backup?

For each backup image, a complete image of the virtual machine is formed through the metadata file, and the effect of each backup is full backup; The backup data generated by each backup of ebackup will be stored in multiple backup files of 4MB size. The data files with dependencies between multiple backups are referenced in the form of pointer index, and each backup point is a virtual full backup. There is no need to merge backup data during recovery, and the recovery efficiency is high

Requirements of ebackup for production storage and backup storage

Production storage must be virtualized data storage, including fusionstorage

Backup storage: CIFS, NFS, San (need to be formatted as VIMS)

Does ebackup support breakpoint continuation?

support. Ebackup breakpoint continuation records the backup progress to the database periodically. When the backup agent fails, the backup server will continue to recover according to the latest record. For example, backup a 10g disk and record it every 2G. When the backup reaches 5.5G, the backup agent fails. After automatic failover, the backup will continue from 4G.

CBT Technology

CBT (changing block tracing): a technology based on virtual machine snapshot, which records the changed data blocks of virtual machine after snapshot into CBT file

Principle: track the changes made to the virtual machine, and only back up the changed data blocks

CBT can be used for recovery, recovering only changed data blocks

Technical features:

1. Shortest backup time: only truly unique change data is sent, so as to minimize network traffic and backup period

2. Shortest recovery time: when recovering to the original virtual machine, only the data blocks changed since the backup of the target recovery point are recovered, which significantly reduces the recovery time

Clear: CBT is a backup technology. It is the core technology of ebackup backup. Because backup is often a periodic work, it is necessary to have a better backup method – differential backup or incremental backup

Grasp three key words: memory bitmap, CBT file and CBT version number

Understanding ideas:

1. Backup is a continuous work – > dirty data will be generated during backup – > freeze the data row using snapshot technology – > generate incremental disk — > after backup, the snapshot has completed its mission, and the snapshot will be merged

2. Based on 1, it can be concluded that the data backed up is the data at the start of backup (please remember this point and understand at 3, 4 and 5 o’clock)

3. Memory bitmap: Records whether the of each data block has changed since the last backup. Therefore, 1 bit is used, 1 means yes and 0 means No

4. CBT version number, recording each backup, serial number of each data block, length of 4 bytes, which is further understood by 5

5. CBT version number, set to ver, memory bitmap value, set to m, the x-th backup: if (x = = 1 & & dateback! = null) then ver = 1;   if (x ==1 && dateback == NULL) then ver =0 ; if ( x !=1 && m == 1) then ver = x ; if (x !=1 && m ==0 ) then ver = ver ;

6. CBT document is used to record (store) CBT version number

7. It can be seen from the above that differential backup or incremental backup can be carried out through the CBT version number recorded in the CBT file.

Incremental backup: if (ver = = x) then back up the data block corresponding to the CBT version number

Differential backup: if (ver! = 0 | ver! = 1) then back up the data number corresponding to the CBT version number

>

 

 

 

What types of networking does ebackup backup support? Does it support the process of server free backup of virtual machines?

Common data backup systems mainly include LAN base, LAN free, server free and other structures

Ebackup backup does not support the process of server free backup of virtual machines

。 Server free networking and its advantages and disadvantages

 

Production storage should support self snapshot, and the backup software is compatible with this type of storage at the same time. Send control instructions through the backup server. First take a snapshot (or other similar operations) of the data volume to be backed up to form a copy, and then use the backup server to mount the snapshot volume, and use the backup server to back up the data on this volume to the backup device.

Advantages: 1 Almost no impact on business hosts

2. Almost no impact on the existing business network

3. The backup performance is good and depends on the San network

Disadvantages: 1 Large investment in network

2. High requirements for equipment

。 Will the data size decrease after ebackup backs up the virtual machine?

When CBT is used to back up virtual machines, all 0 data blocks will not be backed up, so it will be reduced

Ebackup supports the re deletion compression function, which will also be reduced after it is turned on.

It can be understood that my disk originally has 10 partitions, and then I use ebackup for backup. Does it still belong to 10 partitions? If the CBT area is smaller than 10, it will be deleted at the same time.

。 Ebackup re deletion compression technology

As a data compression technology, data deduplication eliminates redundant data by automatically finding duplicate data, retaining only one copy of the same data, and replacing other duplicate copies with pointers to a single copy. Ebackup backup management system supports data deduplication technology to reduce the consumption of back-end storage space and meet the growing demand for storage capacity.

Principle: after the data is divided into blocks, the similarity of different data blocks is detected, and the redundant data is eliminated by deleting the duplicate data blocks (the data in the dotted box represents the duplicate data).

 

 

 

What modules does ebackup have? What are the modules of the backup server?

Backup server module, backup agent module.

How to find the source Lun when ebackup has LAN free mode?

In fuioncompute, data storage is transformed according to the storage device. WWN number and SCSI can be seen in the storage device_ The SCSI ID of the VM Lun to be backed up is returned by VRM_ The ID is given to the backup agent. At this time, the backup agent also has the ability to access this block of devices and obtain SCSI_ ID, so it mounts the SCSI device, so find the snapshot file in the source Lun where the data is read, and then read the snapshot for backup.

What reply information does VRM return to ebackup’s backup agent?

VRM replies the SCSI of the block device where the VM is located to the backup agent_ ID and snapshot information.

Does the backup agent want to mount the source block storage during backup?

Yes. Moreover, during the backup process, the production storage is still accessed and the business is continuously.

Why is the production storage of ebackup virtualized data storage or fusionstorage?

Because ebackup is an online backup, there will be data changes during the backup process, which will lead to data consistency problems. Snapshot is used to achieve data consistency. Therefore, to snapshot storage, production storage must be virtualized data storage or fusionstorage (through its own snapshot).

Backup storage: VIMS, CIFS, NFS

When the production storage of ebackup is fusionstorage, how is the snapshot printed?

Fusionstorage manager receives the control flow of backup agent snapshot, and fusionstorage manager informs fusionstorage agent that fusionstorage agent – > VBM of VBS snapshot

Is there a single point of failure in the backup server of ebackup?

The new version supports active and standby.

What are the limitations of ebackup in desktop cloud scenarios?

Full memory desktop is not supported; Opening Icache is also not supported; Because there is no way to take a snapshot of these data, you cannot use ebackup for backup.

Ebackup involves three concepts when operating storage. Are they?

Storage unit: back-end storage for backup;

Storage pool: an abstract layer formed by storage units;

Repository: the location where the backup data is stored and created in the storage pool.

Why is the design of storage unit, storage pool and repository adopted?

Flexible adjustment of backup storage space

What are the three concepts involved in ebackup’s backup operation?

Protection set: you can add containers. Who to back up.

Backup strategy: how to backup? When to backup, cycle, re delete and compress?

Backup plan: combine the backup strategy with the repository to perform backup tasks. It consists of protection set, backup policy and repository.

Features of ebackup: container?

Containers are VMS, clusters, CNA hosts, and storage. Overall VM protection can be carried out for clusters, hosts and storage. When a VM is added or removed under the container, the newly added VM or removed VM will still not be backed up when the backup task is executed again.

How are virtual machines pulled up on the disaster recovery side?

Manually pulled.

The production host uses fusioncompute. What kind of snapshot technology is used?

Virtualization: row + CBT

FusionStorage:ROW

Cna host snapshot. Who took the snapshot?

File system, VIMS, NFS

Ebackup backup limits the number of virtual machines

10000 VMS

How to restore an ebackup backup? Is there a breakpoint for recovery?

If there is a breakpoint to continue the transmission, wait for the prompt of the next ebackup backup, and continue the transmission from the fault point (if the backup fails, the recovery is the same)

Backup window?

It refers to the time interval, or the time period used for backup, when the business system normally used by users is not affected. The backup window is set according to the operation characteristics.

1. Does it have an impact on the business? What about the backup window?

It needs to consume host resources and has an impact on business. Choose idle time

2. Can you back up files?

No, ebackup is a backup for virtual machines

Ebackup backup software Networking

 

 

 

Ebackup permanent incremental backup

1. Except for the first full backup, other backups only back up the incremental data relative to the last backup

2. For each backup image, a complete image of the virtual machine is formed through the metadata file. The effect of each backup is full backup

3. Reduce storage space occupation, save user investment, improve backup efficiency and reduce backup window requirements

4. It supports online backup and does not need the virtual machine to stop business

5. Realize backup through virtual machine snapshot without installing agent on the virtual machine to reduce or eliminate the impact on the virtual machine

6. Support VM block level incremental backup / recovery, greatly improve backup / recovery efficiency and shorten backup / recovery window

Ebackup LAN base control, backup and recovery flow

 

 

 

Ebackup LAN free control, backup and recovery flow

 

 

 

How to implement backup in KVM scenario?

In the KVM scenario, you need to call cinder backup to complete the backup. It mainly calls ebackupdriver to drive ebackup for backup through cinder backup, and completes volume mounting through cinder volume.

Users can connect with the cinder API through oceanstordj to complete the backup operation on oceanstordj. You can also complete the backup operation on manageonesc.

During the exam, although the question does not specify that it is a backup in the openstack scene, the implicit condition of the question is to complete KVM backup in the openstack scene.

Examination questions:

Briefly introduce how to back up in the cloud scenario, and what are the functions of each component?

Private cloud backup

Csbs karbor: strategies for storing and scheduling backup and recovery

Manage & Workflow: similar to backup server

Server & proxy: similar to backup proxy

I watch the PPT by myself and seldom take the test

What is the biggest difference between the two backup networking methods

The biggest difference is whether to open up the storage network and whether to transform the existing network.

*How can FS storage go_ Base? Can it be used as backup storage?

Fusionstorage can’t go LAN_ Base, which can be used as backup storage by mounting volume, but it is not necessary.

The biggest difference between the two networks. For example, he also said that my customer’s budget is enough to get through the storage plane and has a high demand for business bandwidth, but why do I choose LAN_ bsae。 Finally, he reminded me that I answered it mainly because I can choose to back up when the business is free.

The requirements for backup window are not high, and LAN free is not required. It may be possible to backup when the business is idle.

Why should LAN free get through the storage plane?

Because of this, the backup data stream can go to the storage plane instead of the production management network plane.

How to ensure that the backup data of the virtual machine corresponds to the virtual machine, and there will be no deviation during recovery?

CBT file corresponds to disk file

In addition to what you answered about backup storage, I now use storage from other manufacturers. Manufacturers need to install agents. Do we need to install agents in ebackup?

Ebackup does not need an agent. Ebackup realizes backup through the backup interface provided by fusioncompute or VMware.

Usage scenario

LAN base is generally used in scenarios where the amount of backup data is small and there are no special requirements for the backup window; Making full use of the existing network, there is no need to open up the storage plane, and the cost is low. In such scenarios, the backup server and backup agent are generally deployed by virtual machines.

LAN free is generally used in scenarios with large amount of backup data and strict requirements for backup windows; The reconstruction of the existing network has opened up the storage plane, which has a high cost. In such scenarios, the backup server and backup agent are generally deployed by physical machines.