H13-629 Sample Questions Answers

The client can modify the file system when it accesses it

It allows asynchronous writes to the file system and writes to the disk of the file system when the operation request is not responding

It sets the client's root user does not have root privileges to access the NFS shared file system

NFS shares created can be accessed by all clients

Use 3-tier Tier, 1TB high performance layer, 4TB performance layer, 10TB capacity layer, and configure LUN1 to allocate high-performance layer capacity first, LUN2 preferentially allocates performance layer capacity and LUN3 preferentially allocates capacity layer capacity

Use 3-tier Tier, 1TB high-performance layer, 4TB performance layer, 10TB capacity layer, configure LUN1 and LUN2 to migrate automatically, and LUN3 priority allocation of low-performance layer capacity

The use of 3-tier Tier, high-performance layer 1TB, performance layer is 4TB, capacity layer is 10TB,while configuring LUN1, LUN2, LUN automatic relocation. The LUN3 is migrated preferentially to the low-performance layer

Set the monitoring period of the Smart tier to 8:00 to 18:00 every day from Monday to Friday. The migration period is not overlappedwith the monitoring period

use rmmod + driver name, remove directly

Directly uninstall the driver rpm package

kill directly kill the drive process

use modeprobe-r + driver name, remove directly

True

False

True

False

listener.ora

oracle user's profile file

tnsnames.ora

pfile parameter file

Rewrite the protection

Resource Management

Document Properties

document encryption

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

True

False

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 allthin 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.}

TRUE

FALSE

CommServe

MediaAgent

Library

iDataAgent

Sys status view system status

Through the dev status view system status

Through the dev status view device management started

Through dev status view device management started

Correct

mistakes

True

False

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.

The local storage system does not occupy the local storage system when using LUNs in heterogeneous storage systems

For external LUNs, the local storage system can set value-added functions such as remote replication, snapshots, etc.

smartVirtualization uses multipathing software to connect heterogeneous storage in a multipath-redundant manner

smartVirtualization Dictate write data write efficiency is higher than the write-back efficiency

True

False

True

False

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 snapshotversion 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.

True

False

3.2Mbps

128Mbps

114 Mbps

18 Mbps

VDI application

Database

Mail Service

Seismic geological data

When using the InfoEqualizer function, you need to configure DNS. If you use an external DNS server, when configuring the DNS server, there is a setting of "reverse lookup zone name", network ID setting in this tab, you need to input network ID in reverse order.

When there is a DNS server in the user network, the DNS server in the user network does not need to configure the forwarding record. When the user network without DNS service server, configure the InfoEqualizer DNS IP address as the DNS server's address on the client.

The root domain name is the domain name InfoEqualizer configured for the cluster. This domain name must be configured as the fully qualified domain name, that is, the domain name that includes the root node.

The domain name of the partition is configured as the relative domain name, and the root domain name of the InfoEqualizer is automatically taken as the suffix of the domain name, and the full name of the domain name is formed with maximum support of 32 partitions.

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

For a file system can create multiple snapshots, support snapshotsof 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.

On the slots of the same position on both nodes, such as A3 and B3, you must insert the same type of interface card.

A5 and B5, A6 and B6 can be chosen to be networked, the key is how to make the network connections.

If the back end of the engine cluster is to be directly connected to four control enclosures, add one FC HBA card in slots A2 and B2 for the controller enclosure of direct connection.

A2, A3, A4and B2, B3, B4 can be plugged into a 1Gb iSCSI or 8Gb FC interface module to connect with the business network.

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 hostbusiness during execution

LUN copies and clones can both be executed in the same display

Both LUN copies and clones can be incrementally synchronized

The types of quotas include capacity quota and file quota.

Quota methods include calculating quotas, soft quotas and mandatory quotas.

Thesystem pre-allocates quotas for files before writing the file. When the user cancels the writing of the file being written, the system does not release a pre-allocated quota.

When the user continues to write data, the quota information has been used inthe InfoAllocator interface real-time updates.

Direct use of the root user, in the case ofthe 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 rootuser, perform a fsck fix on the device while the file system is unmounted

When the node a is found through the sms -v command, the status of the IPStor Authentication Module is FAIL. The service of the node A will be from Move toNode B.

unplug the A node power supply, A node's business will automatically switch to the B node

unplug the A node and the backup server network connection, the A node's business will automatically switch to the B node

A, B nodes can work in Active-Active mode, but can only manually achieve the backup service load balancing between A and B nodes

3,5,2,1,4

3,1,5,4,2

3,5,2,4,1

3,5,1,2,4

A client business IO load random read that accounts for more than 60% using SATA, SAS for staging storage, use SSD to do cache, so it will effectively reduce costs and improve random performance indicators

If hot spot data is scattered and changing rapidly, it is recommended to use tiered storage

If there are many SSDs and hotspots, Smart Cache is the best choice

If you have a small amount ofSSD data, use a tiered storage disk for more utilization

vMotion, Storage DRS

Storage vMotion, Storage DRS

vMotion, HA

vMotion, Storage vMotion

180Mb / s

5.5Mb / s

22.5 Mb / s

5.5 Mb / s

100

120

140

180

Correct

mistakes

Locate the exterior first, then the interior

First perform an alarm analysis, then use the replacement method

First find the high-level alarm, then the low-level alarm

Find the common first alarm, after the individual alarm

True

False

True

False

GE LAN-free

10GE LAN-free

FC LAN-free

server-free

The data that has changed since the last backup.

The data that has been changed since the last full backup.

The completion of all data backup.

After the initial backup, all data has back up.

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.

Changethe type of virtual disk created.

True

False

After a snapshot of the LUN of the redundancy site is created, the snapshot is not activated atthe 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.

The disaster recovery side to create a snapshotMap the snapshot to the disaster recovery hostDisaster Recovery Host scans the diskStart disaster recovery applicationTest disaster recovery applications

Forcibly switch the replication relationshipMap lunStart disaster recovery applicationTest application started successfullyResume production business

Stop production application and dismiss the host mappingSwitch the replication relationshipMap lunStart disaster recovery applicationTest application started successfully

Release the host mappingSwitch the replication relationshipMap lunStart disaster recovery applicationTest application started successfully

It is an object-based approach to data replication

ROW snapshots are based on the cyclical manner of data replication

It can be manually set off by the user or system timing synchronization starting

It supports the Quota quota information of the main file system to the slave, no need to configurethe quota.

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.

Rsize / wsize, read and write the maximum size of each block, it is recommended to adjust to the maximum. General Linux operating system environment, the maximum value of 1M.

Async, allowing asynchronous data write, synchronous write requirements. NFS server must brush each data into the hard disk before it can return success delay higher.

Noatime, if you do not need to record the file access time, youcan increase this parameter to avoid frequent access, modify the access time to open pin.

Nolock, if there is a shared file between NFS clients, you can use this parameter. Reduce service-side file lock overhead.

Stop the current production business, delete the host mapping.

Adding the remote device to the original production side array.

With thedisaster 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 incrementalsynchronization.

Delete the original production array consistency group.

CVMA. log

CVNetcheck. log

CVService. log

CVD. Log

Client corresponding partition insufficient space

Client One or more simpana services are not started

The storage policy checked enable managed disk space for disk library option, leading to the disk's thresholds from the effectively managed disk space.

The client is abnormal with cs or MA communication.

Create a mirror LUN for a common LUN. Due to internal information exchange, the LUN ID for hosts’ read and write I/Os changes based on the information exchange result.

A LUN stores 2 GB of data. Create a mirror LUN for this LUN. During the creation, the system automatically generates a copy. The total data amount of the copy and mirror LUN is 4 GB.

HyperMirror can be configured for external LUNs, and external LUNs can be configured as HyperMirror copies.

When configuring HyperMirror, its copies must come from different disk domains.

True

False

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 multipathingsoftware 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

True

False

One Ethernet port can be used to create multiple logical ports

If you type Ethernet ports A and B into VLAN 2, by default the port A and B data are in the same drift group

If binding port A and physical port Bare added to the same VLAN, as long as one physical port in bonded port A fails, the service switches to Physical Port B

When IP Fallback mode is set to Manual, when the port fails to recover, the active port link is in normal status and lasts longer than 1 minute, the system can switch the service to the primary port

4500GB

3500GB

2500GB

1500GB

True

False

acbde

baced

abcde

eacbd

Not just the host with IP 100.43.13.210 can access this NFS share

To query the client for all the NFS shares on the service IP, use the command: showmount -e 100.43.13.11

Mount the NFS shared file system locally and execute: mount -t nfs 100.43.13.11:xs-cmfs / mnt

Verify that NFS shared file system has been mounted locally, executable: mount

True

False

The size of the LUN provided by the VTL back-end storage does not exceed 4TB. The default configuration is write-back, mirroring, and the depth of the slice is 64KB

SIR data The number of LUNs is 2's power of N

SIR index LUN size is at least 4% of SIR data LUN size

It is not recommended to divide RAID across frames

VxFS is a non-log file system that can support morethan 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.

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 thesecondary 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.

Check if the size of the migrated file is the same as the original data.

Check if the number of documents corresponds to the original data

Check if each file with read and write permissions corresponds to the original data

Whether the time for reviewing the case file corresponds to the original data.

LV-test

lv-testa

lv-testb

lv-testbackup

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 writedata, and read-only scenes.

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

Disaster recovery end must be deployed, oracle rac cluster can not deploy oracle single node.

Oracle RAC grid production side of the file must be copied to the disaster recovery side.

Unable to copy the production sideof the FRA file will be able to guarantee the normal provision of services at the northern end.

Production end of the oracle data files and log files can not be placed in the same consistency group.

Support for SMB3 multichannel features that take full advantage of client-side multi-core CPUs and bandwidth resources to dramatically improve performance.

When a hard drive has multiple objects at the same time to write requests, support merged into a large continuous IO, significantly improve system performance.

Internal file system replication, without having to go through the client directly in the system to complete high-speed

Supports 10GE and PCIE networking, providing high performance through high-speed inter-node interconnection and reducing system internal delay.

RPO does not require 0 for the scenario, it is recommended to use asynchronous remote replication.

The main storage using smart cache acceleration, speed up the main storage IO processing speed.

According to the service pressure of the LUNs stored on the primary side, assign the home controllers of each LUN to the A and B controllers.

If you are using an asynchronous remote replication scheme, you need to design a startup synchronization time based on the RPO metrics and consider the setting possible startup synchronization time during the business.

Tier 0 disks perform data equalization.

All disks in theentire hard disk domain will participate in data equalization.

The CK of the target CKG will be released after data equalization is completed.

OCeanstor V3 enables cross-engine data equalization.

0

1

2

Unlimited

True

False

4940G

4280G

5940G

5280G

When smart LUNs act as backup media, smart tier'sperformance improvement on this LUN is not obvious.

During the running of the business, the extent size can be adjusted by the size of the hotspot area to obtain better performance.

Literacy ratio in the 1:9 scenario, enabling the smart tier has greatly improved the performance of the business.

Smart tier has no effect on host performance during hot data migration.

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.

OLAP business query output is usually a statistical value (using group by with order by), soyou can set a larger SGA-target value (relative to OLTP).

It is recommended to use UDEV UUID and drive letter binding, in Linux environment configuration Oracle database, to avoid subsequent maintenance letter changes caused by the database which can not start.

If the database OLTP business log write is very frequent, it is recommended that the appropriate online log file up, but it is recommended not to exceed 128MB.

In Windows2008 or windows2012 operating system environment, in order to improve I/ O processing efficiency, MBR partition is created, and diskpart command is recommended to set the partition alignment.

Parameter file

Control Documents

Archive log file

Data files

A bank has more than XXcustomers and XX corporate customers.

Data loss will be huge and business disruption may result in significant financial loss.

Business interruption has a huge impact, and the interruption time in business deployment is less than 2 hours.

Clientswant to build two live-action data centers in the same city to realize the key business activities such as RTO 2.

Single VIS device failure

Single oracle failure

A single data center full failure

Third-party arbitration array failure

System does not work.

If the device is powered off unexpectedly, some of the business data will be lost.

Business performance is not affected.

Upper business IO read and write will not have any impact.

True

False

The namespace is automatically created when HUAWEI OceanStor 9000 isstarted with the same name as the system namespace.

Namespaces as the root directory of the entire system can not be shared and visited, only if ask the subdirectories below it can be shared and visited.

A unified namespace provide users with a unified storage resource pool to achieve the centralized management of storage space and distribution.

Each file share directory is a subdirectory of the namespace.

Basic rules of retention

Advanced retention rules

Extended retention rules

Special retention rules

True

False

True

False

10

25

50

100

Host - "Linking Primary Array Controller -" Linking From Array Controller -> (Forwarding) Controller operatingfrom a LUN

Host - "Primary LUN Controller -" (Forwarding) Primary Device Controller for Linking - "Link from the array controller

Host - Primary LUN Controller -> (Forwarding) Link Primary Fabric Controller - "Linking From Array Controller-"Hair) from LUn work controller

Host - "Link-connected Primary Array Controller -" Link-connected slave array

True

False

Read operation forsequential read

A single IO is large, the typical value of 64KB ~ 1MB

No IO write operation

Usually data is not overwritten by the cycle or days to measure

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 offthe 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 ofdata 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

pubs

master

msdb

tempdb

Based on lvcb offset reconstruction nude equipment, and the database level 0 backup import

Use the dd command for data migration

Use the cplv command for data migration

Use migratepv for data migration

True

False

The client JobResults directory is full

The media server IndexCache directory is full

The media server can not resolve theclient host name

The client can not resolve the media server host name

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 ownswitch product

1,7,8,9

1,7,15,24

1,4,8,9

1,5,7,9

According to the importance of datameasurement data backup frequency

Measure the backup window based on changes

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

According to measure the backup bandwidth

True

False

Data files

archive log

Control Documents

operating environment(listener tns pfile or spfil, etc.)

The object-based approach to data replication.

ROWsnapshots based on the cyclical manner of data replication.

The user can trigger manually or system timing synchronization.

Support dequota quota information of the main file system to the slave, no need for the slave to configure quota.

VM NIC adapter error

The media server backup service is abnormal

The backup client service is abnormal

Virtual machine disk class behavior IDE

True

False