[Gluster-users] 3.5.2 - files in transit not locked on target?

[Prinsecchi, Paolo (Agoda)]

Hello,
   A newbie question...

Environment:
2 x dedicated servers, Centos 6.4, Gluster 3.5.2. One master (in Asia), one slave (Europe). Used mainly to transport backup files for DRP purposes.
Clients accessing the servers via NFS (mostly windows servers).

Yesterday we upgraded from 3.4.2 to the latest & greatest version, 3.5.2.

In 3.4, files in transit would show up on the destination server with a temporary name, e.g. ".filename.<randomstring>", and would be renamed once the transfer completed. A client waiting for a specific file would get it only once the whole file had been transferred.

In 3.5, we are seeing files in transit showing up immediately on the destination, with the correct name, size gradually increasing and fully readable/writable. In other words, I can easily end up in a situation where a client reads a partial file.

I did a quick test.. started the transfer of a 10G file (it takes a few minutes). While in transit, I tried to open the file in RW mode on the destination, and had no problems doing so. I was even able to rename it while the transit was in progress.

Now, is this intentional behavior? If so, any way I can configure it to indicate somehow that files are still in transit (name change, file attributes, timestamp), or to switch back to 3.4 behavior?

Thanks,
  Paolo

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