H13-629 HCIE-Storage (Written) Questions and Answers

True

False

High-performance layer 550G, performance layer 250G; capacity layer 6T

High-performance layer 400G, performance layer 250G; capacity layer 7T

High-performance layer 800G, performance layer 400G; capacity layer 6T

high-performance layer 600G, performance layer 300G; capacity layer 7T

Data backup

Data restoration

Data copy

Data deletion

True

False

Source LUNs: 1 and 3Target LUNs: 2 and 4

Source LUNs: 1 and 4Target LUNs: 3 and 3

Source LUNs: 3 and 1Target LUNs: 4 and 2

Source LUNs: 2 and 4Target LUNs: 1 and 3

After a snapshot of the LUN of the redundancy site is created, the snapshot is not activated at the same time

Disaster recovery data stored in the Cache, not yet written to the hard disk

When creating a snapshot on the disaster recovery end LUN The production end is copying data to the disaster recovery end

The production end and disaster recovery end adopt the disaster recovery solution of incremental LUN copy. The incremental data is abnormally interrupted during the synchronization process and has not been recovered

Multiple VMs simultaneously run on a single physical server.

VMs on the same server are isolated from each other.

A VM encapsulates the entire system into one or more files.

A VM on one server can run on another server without any modification.

Power off the VTL6900 as a whole without any special requirements

Restart the device according to the following restart sequence:VTL engine restartedSIR engine restartFiber Channel switch and storage unit restart

restart the device as follows to restart the device:SIR engine restartVTL engine restartedFiber Channel switch and storage unit restart

If the VTL engine is configured for A and B two-node clusters, suspend the VTL failover and then restart the VTL engines A and B in turnAfter all the two nodes of A and B are normally started, restore the VTL failover

Data is written into N data blocks of the same size

Yu calculate M check blocks (N=+M) by Erasure code algorithm for every N consecutive data blocks

The system stores N + M data blocks in parallel on different hard disks

In re-Erasure Code storage mode, the system supports up to N hard disk failure

1

2

3

4

Metadata is achieved by mirroring node redundancy

Oceanstor 9000 uses a dynamic subtree to organize metadata

The metadata is stored object-wise in the Oceanstor 9000 system

The metadata is actually stored on the SSD of the storage node

When the used space of the node pool reaches a high water level, the system reports an insufficient capacity alarm. By default, the alarm recovery threshold is 5% lower than the water level. That is, when the used space recovers below 80%, the alarm of insufficient capacity alarm recovery, the alarm threshold and the alarm recovery threshold can be manually modified

When the node pool's used space reaches high water level and spill over is selected, the pool of nodes forbids writing data to any other node pool or specified node pool to write data

When the node pool's used space reaches high water level and no spill over is selected, the pool of nodes forbids writing data, and does not write data like other node pools

When the used space of the node pool reaches the read-only watermark, the system reports an alarm. The alarm recovery threshold defaults to 0% lower than the low watermark, read-only reportPolice recovery.

Correct

mistakes

True

False

15

19

21

17

vMotion, Storage DRS

Storage vMotion, Storage DRS

vMotion, HA

vMotion, Storage vMotion

In order to allow clients to access a single file system, N8000 can provide higher bandwidth and capacity, it is recommended to create a striped file system

Large file access business is a large IO sequential read and write, choose a smaller size of the strip and block size to provide higher bandwidth

From a performance perspective, it is recommended that the total number of files in a single file system be less than 80 million

For reliability, the recommended number of file systems is less than 40

True

False

Due to system upgrades, you need to make a master-slave switchover for the remote replication pair that has been created, and the following conditions need to be met:1. remote copy pair health status is normal, and the copy link is normal2. from the directory has been canceled write protection

If the replication link is down, you can only modify the pair attribute in the cluster where the home directory of production site A resides. After the replication link is restored, the modifiedThe pair attribute is automatically updated to the production site from the directory

Set the channel authentication IP address, which is the static front-end service IP address of any node in the remote cluster, and is used to establish a replication area channelConnection, this node must be in the copy area

The channel authentication password can be modified. After the password is modified, if the copy link is disconnected, you need to manually re-enter the new password and keep the passwordThe password of the originating and receiving ends of the channel in the system is consistent so that the duplicated link can be recovered

True

False

TRUE

FALSE

True

False

Multiple LUNs for Customer Business. When implementing data migration using remote replication, you need to add multiple remote replication tasks to a consistency group

Use remote replication to complete online data migration

LUN copy or remote replication. After the migration is complete, you do not need to do any configuration on the host to start the service

LUN copy data migration. During the copy process, you can dynamically change the migration rate

Monitor GAB and check for changes in cluster members

Guarantee a single view of the members of the cluster

In the absence of a single cluster control, to prevent multiple nodes with Volume Manager to access shared storage

cluster abnormal recovery automatically master node

True

False

lspci | grep SCSI

cat / proc / scsi / scsi

cat / proc / scsi / qla2xxx/* | grep port

lspci | grep Ethernet

Backup tasks will consume a lot of LAN resources.

Backup tasks will consume few LAN resources.

Backup tasks will consume a lot of CPU resources of the production system.

Backup tasks will consume few CPU resources of the production system.

Zhang received maintenance tasks, immediately use the inspection tools configured for real-time inspection tasks, using the default business package, select the device to be checked, and check the project, immediately start the task of system-wide inspection, inspection results are normal

Xiao Zhang plans to inspect the tournament site every Monday morning at 6:00 am, set up a time patrol strategy, patrol with the start, end time and patrolCheck frequency, the configuration is complete and exit the inspection tool off, follow-up every Monday to see if there is any abnormal inspection report results

Xiao Zhang When adding devices in the inspection tool, the configured device IP is the front-end IP address of one of the devices and the device is entered as requiredSSH login management user name and password

Xiao Zhang revised the management user login password for all devices, so you need to modify the password in the device information registered by the inspection tool, Zhang firstRemove the scheduled inspection task on the inspection tool interface, and then modify the device information

When an IO arrives at the storage system, in order to avoid affecting the write performance, the data in the smart cache will not be any changes due to the IO

When reading the data in the missing smart cache, the smart cache pool directly forwards the read IO request to the HDD

If OceanStor V3 is shared between services A and B, the same custom smart cache partition can be used

The system generates a default smart cache partition for each controller by default

180Mb / s

5.5Mb / s

22.5 Mb / s

5.5 Mb / s

If multiple LUNs are used by a service, the LUNs must undergo a consistency splitting after the migration.

If multiple LUNs are used by a service, consistency splitting cannot be performed before stopping services.

For higher migration speed and storage performance, a migration task can be deleted as soon as it is completed.

It is recommended to perform consistency splitting in off-peak hours.

True

False

In the absence of a third-party arbitration site, the quorum disk selects 3 LUNs of the same RAID group in the same array with a size of 1GB

Storage arrays include Huawei and IBM arrays. The arbitration disks are preferably configured on Huawei arrays

In the dual live scenario, when there is a third-party site arbitration array, the arbitration disks are placed on the third-party site arbitration array and an independent UPS power supply is deployed

inspection found that there is a fault condition disk in the arbitration disk, you need to promptly repair or replace the fault arbitration disk

Configure the protection group

Configure the protection strategy

Configure the site and register disaster recovery host

Find the LUNs used by Oracle and make policy protection for these LUNs

True

False

In File System Snapshot when you create a snapshot, you simply copy the root of the file system and save it to form a snapshot of the file system.

Deletion Snapshots use a mechanism for reclaiming space, so snapshot data space is immediately freed after snapshots have been deleted.

After creating a snapshot in the File System, as the main file system is continuously updated, the original data block will gradually become the space occupied by this quick debt. However, a newly written data will not be included in the snapshot space.

File system snapshot data can not be deleted directly, and only after the snapshot has been deleted, this part of the space can be released.

Oceanstor 9000 uses COW technology for metadata

Oceanstor 9000 uses ROW technology for data

Between snapshots of different versions, there is common data between the snapshot and the current year

According to the snapshot version data objects have a backward dependency, so when reading the snapshot data, according to the object dependencies, the system determines from which object to read.

Huawei Oceanstor 9000 can configure different data protection levels for different directories / files.

Data written to Huawei OceanStor 9000 system will be divided according to the size of 4G chunk.

Every N chunk, according to Erasure code algorithm to calculate M chunk calibration fast.

The utilization of protected data space is about N / (N + M), the reliability of the data is determined by the value of M, the greater the M is, the higher the reliability.

True

False

Direct use of the root user, in the case of the file system is mounted fsck repair

Using the owner of the user data file, perform an fsck fix if the file system is mounted

Use the owner of the user data file to perform a fsck fix on the device if the file system is unmounted

Using the root user, perform a fsck fix on the device while the file system is unmounted

DCM (data change map) is mainly used to ensure that the data in the production center is copied to the disaster recovery center according to the order sent by the host to ensure the data consistency

Production, disaster recovery data volume and disaster recovery must be consistent, the name can be inconsistent

Each business configuration a copy volume group, multiple copy volume group can use the same virtual IP

virtual IP and physical IP must be in the same network segment

Stop one or more virtual machines

Suspend one or more virtual machines

Set the virtual machine restart priority

Set host isolation response

96

4

32

12

When configuring the backup client on the VTL side, you need to know that the WWPN of the FC port that connects the VTL to the VTL is available on the server in the sys /class / fc_host directory and subdirectory to the corresponding WWPN port.

Server-side identification has been detected with the library device command is cat / proc / scsi / scsi.

As shown in the figure, among the devices identified on the server side, the device labeled 1 is the scanned library.

As shown in the figure, of the devices identified on the server side, the device labeled 2 is the information for the scanned tape.

True

False

Stop the current production business

Add the remote device to the original production array

With the disaster recovery array as the master LUN and the original production array as the slave LUN, create the remote replication relationship between the DR and the production end and wait for the initial synchronization to be completed.

Make an incremental synchronization.

Delete the original production array consistency group.

True

False

Pause the app before the snapshot, go to the hardware storage snapshot to trigger a common snapshot with application consistency.

Backup software snapshot function can automatically find the storage volume of the file system, database, mail system.

Background snapshots can be indexed to ensure application recovery and small particle recovery.

Snapshots backup can be offline, the backup server almost has no impact.

After a snapshot of the LUN of the redundancy site is created, the snapshot is not activated at the same time.

Disaster recovery storage side of the database resides in the cache has not been written to the hard disk.

When creating a snapshot on the disaster recovery end LUN, the production end is copying data to the disaster recovery end.

The production end and disaster recovery end adopt the disaster recovery solution of incremental LUN copy. The incremental data is abnormally interrupted during the synchronization process and has not been repaired.

Create a 2TB NTFS volume, the default sector (cluster) size is 8KB.

Create a 30GB FAT32 volume, the default sector (cluster) size is 8KB.

NTFS volumes can be set to the largest sector (cluster) to 512KB.

The smallest sector (cluster) that an NTFS volume can set is 4KB.

2TB NL-SAS hard drive, 8D + 2P RAID6 configuration

With 2TB NL-SAS hard disk, configure 8D + 1P RAID5

600GB 15Krpm SAS hard drive, 8D + 1P RAID 5 configuration

Configure raid 10 with 600GB 15rpm SAS hard disk

True

False

Read and write strategies include permanent, default, recycling.

Recycling strategy is suitable for business scenarios that require high performance and small amount of data.

Select out the recycling strategy when the data or write data is the lowest priority.

Resident strategy is suitable for large read and write data, and read-only scenes.

Restore (restore) refers to the previously generated backup set, get one or more objects, and then set to restore these objects.

Recovery (recovery) is a database that is consistent with the given point in time to ensure that this database can be opened.

Usually restored content lags behind the latest database SCN, so you need to ensure consistency through the restoration of the database.

The restored data files can use archived logs and online logs to complete the recovery.

Create a virtual snapshot of the slave LUN and activate it, then map the snapshot LUN to the host for authentication.

After the snapshot LUN is mapped to the host, the host can read and write the snapshot LUN.

After the verification is completed, stop the upper-layer service application, release the LUN mapping, and finally delete the snapshot.

Stop the snapshot before the host can write snapshot LUN.

5 devices TOE NIC A0, B1, and A0, B3 inserted into the PCIe slot will not affect the system. Deployment will not affect the network bandwidth, so it cannot be adjusted.

The signal cables are long and need to be strapped to the cabinet or placed on the bottom tray.

Label NODE 01 A0-0 The signal cable is inserted in the network port A0-1. The signal cable labeled NODE01 B3-1 is inserted in the network position B3-0, due to the same network card two network port peer, you can place the wrong line, you cannot adjust.

CE6850 switch connected to two stacked copper cables, one of which is needed to post-cold more cold, because it does not affect the network interoperability. You can base this software debugging.

Client offline

Media Server Offline

The client can not resolve the media server host name

backup media failure

Manually clear the NMS alarm and turn off the alarm light.

Observe the symptom and collect the fault information.

Troubleshoot according to the "Event Reference" or "Troubleshooting" manual.

Maintain the faulty environment and contact technical engineer for support.

VxFS is a non-log file system that can support more than 2T files.

File system snapshot using copy-on-write (copy-on-write technology) and other files together, share partition or volume storage space.

Provide file system-level snapshots, copy.

File System Snapshots, Scenarios, Replication, etc. Features are based on Storage Checkpoint.

SVP needs to be connected to multiple engines through two PCIe switches, and each engine controller needs to be connected to a PCIe switch to ensure that link redundancy and to improve reliability.

When the control plane is connected to a network, when the engine and the PCI-e switch are interconnected, the port 0, port A3 and PCIe port can be interconnected.

Huawei slot 0 and slot 5 of the OceanStor 18000 engine enclosure can be used to install SAS interface modules and interconnect disk enclosures.

Snapshot file system can be dedicated as a separate space to the client.

For a file system can create multiple snapshots, support snapshots of the snapshot

Snapshot file system provides only read-only access to external, it cannot provide write operations

File System Snapshot Instantly copy the source file system completely available copy, when due to viruses or man-made misuse and other causes of the original file system is not available, the rollback of the snapshot can restore the original file system.

After a snapshot of the LUN of the redundancy site is created, the snapshot is not activated at the same time.

Disaster recovery side of the data stored in the cache, not yet written to the hard disk.

When creating a snapshot on the disaster recovery end LUN, the production end is copying data to the disaster recovery end.

The production end and disaster recovery end adopt the disaster recovery solution of incremental LUN copy, and the incremental data link is abnormal during the synchronization.

The engineer has set the WORM root directory according to the hospital's requirements, and all the subdirectories under this directory have the WORM attribute.

During the file protection period, no one can delete the protected file.

Protected Documents are Protected for a Period of 70 Years on Huawei OceanStor 9000 Storage Device.

WORM log save root, quota and WORM protection period cannot be set.

If the system has monitored the file X has been cached on Node B, the client client1 can read the file directly from Node B.

If the system monitors that node B has cached file X, then node A can read the file from node

After HUAWEI OceanStor 9000 processes the request for reading the file X from client1, the system reserves the message on both node A and node B.

If the system monitors that node A has cached file X, then node A only caches the data of file X and does not cache its verification data

100

150

125

167

0

1

2

Unlimited

True

False

can not sit down

vgchange

vgexport mkdir mknod vgimport

vgremove mkdir mknod vgcreate

fs create striped fs01 10g 3 RG1-LUN1, RG2-LUN1, RG3-LUN1 stripeunit = 2048 blksize = 8192

fs create mirrored fs02 10g 2 RG1-LUN2, RG2-LUN2 stripeunit = 2048 blksize = 8192

fs create mirrored-stripe fs03 10g 2 2 RG1-LUn1, RG2-LUN1 protection = disk stripeunit = 2048 blksize = 8192

fs create striped-miiro fs04 20g 2 3 RG1-LUn1, RG1-LUN2, RG2-LUN1, RG2-LUN2, RG3-LUN1, RG3-LUN2 protection = disk stripeunit = 512 blksize = 1024

OLTP

OLAP

VDI

SPC-1

Pvmove command does not support Linux cluster.

Redhat Linux enterprise 6 version of lvm does not support the pvmove command.

You need to install the cmirror package and run it on the cluster server.

Need to lvm version down to 1.0 before using pvmove migration data.

True

False

4940G

4280G

5940G

5280G

TCP Header

IP Header

ISCSI Header

ISCSI data

SQL Server Authentication

Windows authentication

Log in as superuser

Other ways when landing

You can plan back-end storage network for 9000 internal communications, without planning gateway address, and front-end network with the same network segment IP address.

Oceanstor 9000 front-end network and management network can be considered together, planning for the same network segment.

Back-end CE6850 switches need to use four stacked cables for stacking connection to ensure bandwidth requirements

The external NTP server address and the Oceanstro 9000 front-end network need to communicate to ensure that the oacenstor 9000 system and client applications maintain time synchronization.

True

False

1KM

10KM

25KM

50KM

CIFS does not allow multiple clients to access

The CIFS client writes the shared file and does not write to the storage system immediately. Instead, the file is saved in the local cache and can be read againImprove read rate, improve performance

CIFS does not support anonymous transmission and shared authentication access

CIFS supports a variety of character sets to ensure CIFS can be used in all language systems

FC InfiniBand SAS PCI-edouble can be a carrier of the SCSI protocol

InfiniBand Transmission Speed "FC Transmission Speed" iSCSI transmission speed

FCoE technology for GE and 10GE Ethernet

FCoE SAS InfiniBand has its own switch product

LDAP authentication

WSSE certification

NIS certification

AD domain certification

The CA is responsible for initiating the metadata query

If the global cache read hit, read from the global cache without having to go to the OBS to read the stripe data

Reading data, the MDS is responsible for assembling the slitting data

When writing data, calculate the redundant data by MDS

True

False

When the access to the N8500 is all on the intranet, and the client traffic is not equal, it is recommended to configure the "balance-alb" mode (that is, bond 6 mode).

When creating a LUN, write business for a long time, the stripe depth recommended 512KB.

If the RAID group is configured as RAID 6, the number of member disks is recommended to be 9 disks, and it is not recommended to configure the RAID group.

Fencing LUN should be placed in the same RAID group.

True

False

block is composed of a number of consecutive areas, block number starting from 1, the overall number, grouping

Each i node corresponds to a 1GE file or folder, which stores the description file size, file storage location and other information

The block group consists of a number of consecutive blocks, the number within the block group is determined by the block size

The superblock stores the basic information about the EXT3 file system

NIC

HASHAdow

disk

IP

Both VSA and MA are installed on the virtual machine.

VSA MA ISE are installed on the physical machine.

VSA is installed on the virtual machine, and the MA is installed on the physical machine.

Both VSA and MA are installed on the physical machine.

True

False

Restore the entire data file

roll back to the Council before crying to a certain point in time

Recovery control file

open state can not be restored action

In the same city set up two data centers to do synchronous replication, located in another remote data center to do asynchronous remote replication

Set up two data centers in the same city to form a dual disaster recovery network

Set up a data center in the local and remote sites to form a dual-active disaster recovery network

In the same city set up two data centers to do double live in another remote data center to do asynchronous remote replication

In the fully redundant group environment, occurred the master reset.

With the BST (bad track) feature turned off, a BST bad track appears on the LUN.

The POOL where the business is located is all thin LUN and not a snapshot. LUN copy, clone and copy services are configured in the log POOL, which is a space full of print information.

Log in the following print:2014-01-19 08:04:40} {Receive a disk-fault event of the disk (328) of pool (2) from ctrl.}2014-01-19 08:40:35} {Receive a disk-fault event of the disk (613) of pool (3) from ctrl.}

pubs

master

msdb

tempdb

One Ethernet port can create multiple logical ports

If Ethernet ports A and B are added to VLAN 2, by default the ports A and B data are in the same drift group

If binding port A and physical port B join a unified VLAN, as long as there is a physical port in bonded port A, the service will switch to Physical Port B

When the IP drift mode is set to "Manual", when the port is restored, and the active port link is in a normal state for more than one minute, the system can cut back the service to the main port.

The backup server and the ring server can not communicate properly

The link between the backup server and the media server is faulty

Backup server SQL database failure

DDB is abnormal

Scenario: Sequencing large IO services, especially 1M IO scenarios, with the phenomenon that the back-end read bandwidth is much larger than the front-end read bandwidthTuning: Turn off the corresponding LUN prefetch policy

scene: the order of pressure reading and writing business conditions, high utilization of hard drivesTuning means: increase the unplug-thresh device hard disk device

Scenario: Oracle database in the operation of data backup, the data on the LUN bandwidth does not meet the requirements and accompanied by high utilization of hard diskTuning means: the formal creation of POOL to increase the depth of the points

Scenario: In the case of single concurrent or low concurrent read service, the delay is found to be largeTuning means: change disk unplug 8 Modify unplug - thresh increased from 4 to 8

True

False

True

False

Data Warehouse

online shopping

Data Mining

ERP

10

25

50

100

Connect Huawei storage to the original vio server and perform data migration on the vio server system layer.

Connect Huawei storage to the original vio server and migrate data in the virtual partition system layer.

Create a new vio server for Huawei storage and migrate data in the virtual partition system layer.

Create a new vio server for Huawei storage and migrate data on the vio server system layer.

VDI application

Database

Mail Service

Seismic geological data

FC switch Zone conflict

FC switch IP address conflict

FC Switch Switch Name conflict

FC switch domain ID conflict

Host to the optical switch connection is abnormal.

When configuring the zone on the switch, configure the FC port and the host port that works in the working mode of the VIS6600T as a target in one zone.

The working mode of the VIS6600T is abnormal because the initiator's FC port is connected to the optical switch.

In the working mode of VIS 6600T, the connection between the FC port of the target device and the optical switch is abnormal.

oplock

noguest

fs-mode

hide-unreadable

EXP

RMAN

EXPdp

imp