H13-629_V2.0 Sample Questions Answers

True

False

Scenario: Sequencing large IO services, especially 1M IO scenarios, with the phenomenon thatthe 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 POOLto 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

The disaster recovery walkthrough automatically stops the production application and unproduces the production to production host mapping on the deviceManager

The application ofdisaster recovery drill is mainly about the production system to switch to disaster recovery operation, exercise disaster recovery environment is correct

After the disaster recovery drills are executed, the replication relationship will be split, and the disaster recovery end will take over the production system running service

The Drill process can be normal in the production side to stop the business, a quick move to a disaster recovery operation

smart Erase

smart Dedupe

smart Compression

Volume mirror

Chunks in a CKG may come from different types of disks.

A LUN consists of extents or grains.

Chunks in a CKG may come from the same disk.

Chunks in a CKG may come from different storage pools.

True

False

TRUE

FALSE

Standalone SAN engine and stand-alone file engine

Parallel dual-stack by way of parallel support (SAN) and file system (NAS)

Use unified storage pool technology

file system can achieve deduplication data compression function

Use the same type of disk as the master

Raid should be set the same as the master

The capacity of Lun and primary LUN is the same

Use the same number of disks as the master

After a snapshot of the LUN of the redundancy site is created, the snapshot is not activated at thesame 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 automatically created Asynchronous Remote Copy snapshot can either be a private quick pick or a public one.

In a DR scenario, it is recommended to create a virtual snapshot of the secondary LUN and map it to the host for access.

In remote replication link networking, parallel networking is better than crossover networking.

The number of LUNs in the consistency group should be as small as possible, and only the LUNs that have write dependencies on the same application are placed in a consistency group.

TCP Header

IP Header

ISCSI Header

ISCSI data

The hard disk is divided into chunks.

Lun consists of extend or grain

A CKG chunk may come from the same hard disk.

Chunk in a CKG may come from a different storage pool.

Turn off the power of allrunning virtual machines or migrate these virtual machines to another data store

Use the esxcli storage vmfs extent list command to obtain the name and partition of the vmfs data store to be backed up after the provision of number of the supported devices.

voma -m vmfs -f check -d /vmfs/devices/disks/naa.60022a110009a8a800042e1800000000:1

voma -m vmfs -f check -d naa.60022a110009a8a800042e1800000000: 1

Reduce the number of snapshots.

Reduce the number of virtual machines per LUN.

Increase the number of LUNs and limit the number of hosts accessing the same LUN.

Change the type of virtual disk created.

True

False

ClientBalance

Cluster nodes balanced

Service layer balance

Instance load

To improve the reliability of the video data storage device, the user turns on the securevideo feature of the data disk using a 4 + 1 protection level

The user turns on the securevideo feature, with two data corruptions if the data disk uses a 4 + 1 protection level and only 3 for a write operation

Users open the securevideo feature data consistency scanning, the system does not complete the data files, will be cleaned up

After the user turns on the securevideo feature, the file corruption event has been reported while reading and writing files, and the data recovery failure alarm is no longer reported

3,5,2,1,4

3,1,5,4,2

3,5,2,4,1

3,5,1,2,4

The equipment in the picture has completed the equipment preparation step

The corresponding LUN in the figure is a LUN created on the service hard disk of the engine

Change the equipment status is normal

The process of preparing a physical device is the process of virtualizing a LUN mapped from an array, similar to a quick format

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 bemanually 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 reacheshigh 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.

acbde

baced

abcde

eacbd

Source LUN: 1 and 3Destination LUN: 2 and 4

Source LUN: 1 and 4Destination LUN: 3 and 2

Source LUN: 3 and 1Destination LUN: 4 and 2

Source LUN: 2 and 4Destination LUN: 1 and 3

Correct

mistakes

listener.ora

oracle user's profile file

tnsnames.ora

pfile parameter file

The client must also support the SMB3.0 protocol

Ifthe client has only one network port, you can not use the SMB3 function

If the client has a GE network port with the same type and number of ports, when the client uses SMB3 to access Huawei OceanStor 900, the client will establish multiple connection channels with Huawei OceanStor 9000

If the client has two or more GE and 10GE IB ports of the same type, after the SMB3 is applied, when one of them is disconnected from the network port, business will be interrupted.

The disk on the array on which the failed mirrored volume failed

Array where the failed mirrored volume is powered down

The RAIDarray is degraded on the array where the failed mirrored volume is residing, and the hot spare is being rebuilt

All optical links between the VIS 6600T and the array in which the failed mirror volume is located have failed

Before plugging and unplugging the controller, make sure that the service is stopped or has switched to the peer controller

Before switching services to the peer controller, check that the multipathing software in the system is installed and effective on the host.

Confirm Cache dirty data has been saved

Master-slave controller must be switched to be replaced controller for backup

With continuous random read: RAID 5 performance is superior to RIAD10

With sequential read and write, RAID 5 performance are better than RAID10

With sequential write, RAID10 better than RAID5 performance

With continuous random read, RAID 5 and RAID 10 performance is equal.

True

False

127.0.0.1 localhost129.22.221.200 cluster-scan129.22.221.201 node1129.22.221.211 node1-vip192.168.222.211 node1-priv129.22.221.202 node2129.22.221.212 node2-vip192.168.222.212 node2-priv

127.0.0.1 localhost129.22.221.200 cluster-scan129.22.221.201 node1129.22.221.211 node1-vip192.168.222.211 node1-priv129.22.221.202 node2129.22.221.212 node2-vip192.168.221.212 node2-priv

127.0.0.1 localhost129.22.222.200 cluster-scan129.22.221.201 node1129.22.221.211 node1-vip192.168.222.211 node1-priv129.22.221.202 node2129.22.221.212 node2-vip192.168.222.212 node2-priv

127.0.0.1 localhost129.22.221.200 cluster-scan129.22.222.201 node1129.22.221.211 node1-vip192.168.222.211 node1-priv129.22.221.202 node2129.22.221.212 node2-vip192.168.222.212 node2-priv

Log analysis tools can run on any PC, do not need to interoperate with the storage system, the analysis process time according to the amount of the log may be, may it takes a long time

Log Analysis Tools After starting the analysis, the analysis tasks need to be stopped due to other reasons. Click on the analysis tool to abort this analysis

Engineer A deleted the original compression of the results of the collection, then the results will be collected to re-catalog the contents of all documents compressed into zip format for the dayChi analysis tools for analysis

After the analysis is completed, all the problems caused by the log analysis will be presented in the list of problems, and "View Details" contains the approximate cause of the problem and processing advice

LUN copies and clones have the data of the original volume at the moment when the original data is initiated (or started) for the backup of the original data

LUN copies and clones need to stop the host business during execution

LUN copies andclones can both be executed in the same display

Both LUN copies and clones can be incrementally synchronized

GSLB

VIP

SLB

GLB

True

False

The customer needs to provide 16 IP addresses for Oceanstor 9000 system back-end IP and need to provide a gateway.

Customers need to provide nine management network IP addresses, of which eight for IPMI management, one for OM management.

The customer management network must be interoperable with the OceanStor 9000 InfoEqualize DNS IP to access the OceanStor 9000 storage.

The client needs to provide49 IP addresses that can interoperate with client applications, 16 for the static front end, 32 for the dynamic front end, 1 for InfoWqualizer DNS IP.

TheSIR cluster of the VTL6900 supports global deduplication

The deduplication start time of the VTL6900 can be controlled automatically according to the policy

VTL6900 on the specified tape deduplication and remote replication is recommended at the sametime

VTL6900 deduplicated tape to do data archiving, the physical tape library in the NC is still non-deduplicated data

True

False

Add Library # 2 pathfor Policy # 1

Configure the data path to "Use Alternate Data Paths" mode

Set the data path to Round-Robin between Data Paths

Configure the data path to "Use preferred Data Path" mode

According to the importance of data measurement data backup frequency

Measure the backup window based on changes

According to the size of the data to measure the data retention period

Accordingto measure the backup bandwidth

8K

16K

64K

128K

True

False

NIC

HASHAdow

disk

IP

CVMA. log

CVNetcheck. log

CVService. log

CVD. Log

rm delete file operation

mkfs. ext3 format file system operation

dd command

Continue to write new data to the file system after the file system is damaged

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.

4 + 3: 1

6 + 3

4 + 2

12 + 3: 1

Client offline

Media Server Offline

The client can not resolve the media server host name

backup media failure

4940G

4280G

5940G

5280G

Stop the current production business, delete the host mapping.

Adding the remote device to the original production side array.

With the disaster recovery array as themaster 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 theoriginal production array consistency group.

The service plane uses GE channels for data transmission.

The service plane connects the host IO channel, disk IO channel and GE switching channel.

Plane redundancy between each other, when the business plane fails, allowing the use of control plane transmission services.

When the GE switch channel fails, you can use the PCIe switch channel as a backup data transmission channel.