Re: Real Time Mirroring of a NAS

[Maurice Hilarius <maurice@harddata.com>]

andy liebman wrote:
> ..
> Thanks for your reply, and the suggestions of others. I'm going to
> look into both NBD and DRBD.
>
> Actually, I see that my idea to export an iSCSI target from Server B,
> mount it on A, and just create a RAID1 array with the two block
> devices must be very similar to what DRBD is doing, but my guess is
> that DRBD, with it's "heartbeat" signal, is probably more robust at
> error handling. I'd love to hear from somebody who has experience with
> DRBD.
>
> By the way, I use 3ware 9550SX cards. On a 16 drive RAID-5 SATA array,
> I can get sequential reads that top 600 MBs/sec. That's megabytes, not
> megabits. And write speeds are close to 400 MB/sec with the new faster
> on-board XOR processing. And random reads are at least 200 MB/sec. So,
> 10 GbE is a must, really.
>
> Andy
>
Hi Andy.

A couple of other suggestions that may prove helpful:

1) EVMS
http://evms.sourceforge.net/


2) Lustre
http://www.clusterfs.com/
http://www.lustre.org/



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With our best regards,


Maurice W. Hilarius        Telephone: 01-780-456-9771
Hard Data Ltd.  FAX:       01-780-456-9772
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