Snapvault lag value

[1VINAYKUMAR]

Hello everyone,

Just want to know about the Lag. what is lag value here. can somebody help to explain it.

systemA> snapvault status -l

Snapvault is ON.

Source:                         systemA:/vol/vol2/qtree3

Destination             systemB:/vol/sv_vol/qtree3

Status                  Idle

Progress:               -

State:                              SnapVaulted

Lag:                                2:09:58

SnapVault Timestamp:    Thu Jan 31 12:30:01 PST 2002

Base Snapshot:                  systemB(0016778780)_sv_vol.59

Current Transfer Type

Current Transfer Error:

Contents:               Replica

Last Transfer Type:         Scheduled

Last Transfer Size:         1680 KB

Last Transfer Duration: 00:02:08-

regards

VINAY

[cscott]

Hi Vinay,

     In the status -l output the lag you have is 2 hours, 9 mins, and 58 seconds since the last replication completed.

You can verify this yourself by running "snapvault status -l" multiple times in a row.  Using the "-l" flag is a long output with more detail so in the normal snapvault status output you will not see seconds, only when you specify the "-l" flag.

- Scott

[MSTORAGE_1986]

Hi Vinay ,

Lag value is  updated snapvault/snapmirror timestamp value.(It depends on the schedule which you have set in snapvault.conf file).

Regards,

Manish

[HARI_KRISHNA981]

Hi Vinay,

Here Lag in 2:09:58 (hh:mm:ss) indicates the time difference between the data currently on the primary storage system and the latest data stored on the secondary storage system; that is, the difference between the current time and the time stamp of the Snapshot copy last successfully transferred to the secondary storage system.

The lag time will always be at least as much as the duration of the last successful transfer, unless the clocks on the source and destination are not synchronized (in which case it could even be negative)

Regards,

Hari.

[1VINAYKUMAR]

great thanks a lot, I have one more doubt while running the "snapmirror status -l" there is one more option as "Last Transfer Duration: 00:00:04" is it somthing like last file mirroring duration?

[MSTORAGE_1986]

Yes it shows last update time duration.(it took 00:00:04 to complete the update)

[HARI_KRISHNA981]

Hi vinay,

great thanks a lot, I have one more doubt while running the "snapmirror status -l" there is one more option as "Last Transfer Duration: 00:00:04" is it somthing like last file mirroring duration?

" Last transfer duration " field shows the elapsed time for the last successful transfer to complete . If the transfer is failed and restarted, the time included time waiting to restart the transfer. If a transfer aborted and was retried from the beginning, it includes only the time required for the final successful attempt.

Regards,

Hari.