v1 replication

Question

Hi, I just tried to use celerra replicator v1. I just like to check if i am going the correct way . Please let me know if anything else to be done . DART running at 5.6 and source celerra is ns704 and target is nsx.

1) enabled V1 licenses on both source and target.
2) set same time on both the source and target data movers and control stations( they are in different time zones).
3) on the source we have file system with 5 gb
4) create a checkpoint of the source file system.
5) establish communication between source and target control stations using nas_cel -create on both source and target sides.
6)created a destination file system with same size as source and mounted it r/o and type rawfs.
7)copy the source checkpoint to the destination file system using the fs_copy -start src_ckpt1 dest_fs1:cel=remote celerra -o convert=no, monitor off.

The real problem arises here the copy command doesnot complete it shows as 100% remaninig all the time. I am trying to figure it out what else i am missing. So please suggest me what else needed to be done.

Thanks,

Rainer_EMC · Accepted Answer

you need to refresh the checkpoint and do an incremental fs_copy againIf you want fully automatic you should use Replicator with fs_replicate instead

gbarretoxx1 · Answer

Hi,the setup is correct. Both systems are running the same major version ( 5.6 ), right ?If the initial copy is not finishing, I recommend you to open a support case.Also, if you are running NAS code 5.6, the repV2 has several enhancements.Gustavo Barreto.

vimad · Answer

So after running the incremental fs_copy command if there are any changes that will be copied to the destination file system is that right. So after running the incremental fs_copy if there are changes occuring on the source file system then will they be automatically tranferred to the destination or we need to refresh the secondary checkpoint and do the fs_copy incremental again .

Thanks

vimad · Answer

when runnig the intial fs_copy how can i verify that copy is being done to the destination . when i run fs_copy -i src_fs_ckpt1 it shows percentage remaing as 100% and when i run the same command again it again shows 100% remaining.

gbarretoxx1 · Answer

Hi,after the initial full copy, you need to create the replication with fs_replicate command, the run an incremental fs_copy whitout option 'convert=no'.Gustavo Barreto.

vimad · Answer

Thanks for the info.

After we setup the replication between the source and destination celerras do we need to refresh the secondary checkpoint and do the differential fs_copy for copying the modified changes made to the source file system to the destination or do we need to use the fs_replicate refresh command. How exactly this operation works. When there is change is source file system how the changed data is copied to the destination file system. Can anyone please give me a clear picture on how it works.

Thanks

vimad · Answer

Thanks for the info .. I just like to know how can we calculate the throughput when we are performing the intial fs_copy (from source checkpoint to the destination file system).

Rainer_EMC · Answer

see the Monitor Replication section in the Using EMC Celerra Replicator (V1)

the fs_copy -list options should show you how may percent is done

or do a time "fs_copy ..." and compute it

I dont think there is a kB/s in the command - maybe in the messages in server_log

vimad · Answer

Thanks for the info, we are replciating the file systems using v1 and we are getting very less throuhput . Is there anything we can do on the celerra to increase the throuhput for the replication.

vimad · Answer

I need a small clarification, during the replication if suddenly network connection is lost between the source and destination and when the network is up again do we need to start the replication from the scratch like do the full fs_copy again and start the replication or is there any way to start from where the connection is lost.

Thanks,

gbarretoxx1 · Answer

It will keep retrying untill the network is back, and it will resume from where it was before.

vimad · Answer

So if we just down one on the data mover interfaces down which are used for replication and make it up again the replication will automatically start from the point where we lost .Is that right?Thanks

Celerra

v1 replication

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