Free and Premium Netapp NS0-155 Dumps Questions Answers

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Because volume SnapMirror works at the block level, the source and destination must both be FlexVol volumes in the same aggregate type. The source and destination of a volume SnapMirror relationship must either both be FlexVol volumes in 32-bit aggregates or both be FlexVol volumes in 64-bit aggregates.

Therefore you cannot create a volume SnapMirror relationship from a FlexVol volume in a 32-bit aggregate to a FlexVol volume in a 64-bit aggregate or vice versa.

The operator must ensure that the partner filer does not become operational at any time while a filer is in a takeover mode initiated by the use of this command

SnapRestore overwrites all data in the file or volume. After you use SnapRestore to revert to a selected

Snapshot copy, you cannot undo the reversion.

User and group quotas do not apply to the root user or to the Windows Administrator account; tree quotas, however, do apply even to root and the Windows Administrator account.

If no Host Agent is installed, how can the management tool query the host?

When you rejoin split aggregates, Data ONTAP mirrors the data from one aggregate to the other and destroys data that existed on that aggregate before the rejoin.

The rules for the selection of disks or array LUNs, for using as mirrored aggregates, are as follows:

Disks or array LUNs selected for each plex must be in different pools.

The same number of disks or array LUNs must be in both the plexes.

Disks are selected first on the basis of equivalent bytes per sector (bps) size, then on the basis of the size of the disk.

If there is no equivalent-sized disk, Data ONTAP uses a larger-capacity disk, and limits the size to make it identically sized.

Data ONTAP names the plexes of the mirrored aggregate.

This question implies that there is an issue with the clustering of the two controllers. Since this is the case you will want to run the cluster configuration checker to identify and resolve any issues.

Section: Data Protection

NetApp also recommends that if deduplication is used on the source volume, then it should also be used on the destination volume. However, you are not restricted using deduplication on the source volume only.

The deduplication schedule is not tied to the qtree SnapMirror update. In other words, the deduplication process does not automatically start at the completion of the qtree SnapMirror transfer.

The fingerprint database and the change log files that are used in the deduplication process are located outside of the volume in the aggregate and are therefore not captured in Snapshot copies

The maximum cable length supported for 2Gbps is 500m, the same as the max cable length between a NetApp storage system and a FC switch.

Stretch MetroCluster (sometimes referred to as nonswitched) is simply an active-active configuration that can extend up to 500m depending on speed and cable type. It also includes synchronous mirroring (SyncMirror®) and the ability to do a site failover with a single command. See Figure 2. Additional resiliency can be provided through the use of multipathing.

Ensure that both plexes of the mirrored aggregate you are splitting are online and operational.

snapmirror update [ -S source ] [ -k kilobytes ] [ -s src_snap ] [ -c

create_dest_snap ] [ -w ] destination

For asynchronous mirrors, an update is immediately started from the source to the destination to update the mirror with the contents of the source.

For synchronous mirrors, a snapshot is created on the source volume which becomes visible to clients of the destination volume.

The snapmirror update command must be issued on the destination filer.

snapmirror release source { filer:volume | filer:qtree }

Tell SnapMirror that a certain direct mirror is no longer going to request updates.

If a certain destination is no longer going to request updates, you must tell SnapMirror so that it will no longer retain a snapshot for that destination. This command will remove snapshots that are no longer needed for replication to that destination, and can be used to clean up SnapMirror-created snapshots after snapmirror break is issued on the destination side.

The source argument is the source volume or qtree that the destination is to be released from. The destination argument should be either the destination filer and destination volume name or the destination filer and destination qtree path. You can use a line from the output of the snapmirror destinations command as the set of arguments to this command. The /etc/snapmirror.conf file exists on the node containing the mirror used for SnapMirror.

Each open systems platform, when prompted by the secondary system, transfers initial base images of specified directories to qtree locations on the secondary system.

Note: There are no primary-side Snapshot copies in Open Systems SnapVault.

Two multipath methods are supported:

The multiplexing mode causes snapmirror to use both paths at the same time. If one should fail, it will switch to use the remaining path only and use both again should the failing path be repaired.

Failover mode causes snapmirror to use the first path as the desired path and only use the second path should problems arise with the first path.

Only hostnames and IPs are referenced in /etc/hosts, so A is incorrect. The question states that the qtree was mounted, and B and D would preclude this so they are incorrect.

You need to set a qtree to mixed or unix security style to support UNIX users.

Using the -p option may reduce the extra storage requirements in a flexible volume when reallocation is run on a volume with snapshots. It may also reduce the amount of data that needs to be transmitted by SnapMirror on its next update after reallocation is performed on a SnapMirror source volume.

The following commands are available in the lun suite:

Easy to use interactive mechanism for setting up initiator groups, LUNs, and mapping configuration.

vol options nosnapdir [on|off]

If this option is on, it disables the visible .snapshot directory that is normally present at client mount points, and turns off access to all other .snapshot directories in the volume. The default setting is off.

The pktt command controls a simple on-filer packet tracing facility. Packets can be captured into a trace buffer then dumped to a file, or the captured data can be logged to a file. The data is stored in "tcpdump" format, and can be directly viewed with tcpdump, ethereal, and perhaps other viewers. The output can also be converted using the editcap(1) program to a variety of other formats, including Sniffer, NetMon, and snoop.

-s

Display a summary of the output columns upon termination, descriptive columns such as `CP ty' will not have summaries printed. Note that, with the exception of `Cache hit', the `Avg' summary for percentage values is an average of percentages, not a true mean of the underlying data. The `Avg' is only intended as a gross indicator of performance. For more detailed information use tools such as na_nfsstat, na_netstat, or statit.

ifconfig - Configures network interface parameters.

You can export any file path. Implicitly file paths are filesystem objects. You can export a directory, a qtree, a volume or even a file.

The root volume is always vol0 and etc is contained therein. When exporting the root volume via NFS, the path is/vol/vol0; so the full path to snapmirror log files is /vol/vol0/etc/log.

/etc/log/snapmirror.

This file logs SnapMirror activity. Log file for current week.

/etc/log/snapmirror.[0-5] SnapMirror log files for previous weeks.

ifstat - display device-level statistics for network interfaces

netdiag - perform network diagnostics