Very Computer

by **mora..** » Sat, 22 Jan 1994 10:56:01

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Kristina F. Morales
Academic Computing Facility

by **mora..** » Sat, 22 Jan 1994 06:01:06

Hi!

I am not a unix systems administrator, however, I am asking
this question on behalf of a friend: Can someone recommend a
software, free or otherwise, which does file system synchronization
across multiple unix file servers?

Thank you in advance for your help!

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Kristina F. Morales
Academic Computing Facility

by **ji..** » Thu, 27 Jan 1994 09:11:51

writes:

Quote:
> Hi!

> I am not a unix systems administrator, however, I am asking
> this question on behalf of a friend: Can someone recommend a
> software, free or otherwise, which does file system synchronization
> across multiple unix file servers?

> Thank you in advance for your help!

Hi, I think I am interested in the same question. Are you asking
about how to sincronize two UNIX machines (SERVERS) so that if one goes
down the other can take over w/o any lost productivity?

If this is it and you find out, please let me know.
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by **Ronan Ell** » Thu, 27 Jan 1994 02:19:59

I'm looking for the same solution. Our production servers need to have "point
of failure" recovery. In order to accomplish this the primary and backup
directories must be in sync.

If replying by E-Mail, please send a copy to me!

Thanks,
Ronan

by **Benjamin Z. Goldste** » Sun, 30 Jan 1994 12:43:22

>I'm looking for the same solution. Our production servers need to have "point
>of failure" recovery. In order to accomplish this the primary and backup
>directories must be in sync.
>If replying by E-Mail, please send a copy to me!
> Thanks,
> Ronan

I didn't see the original message so I don't know exactly what is
being asked for here. To get true file system syncronization I think
you need kernel support and/or shared disks (e.g. DEC's STAR-cluster
for VMS configuration). If you can support loosing some data
temporarily then a simple script that goes through the file system
looking for changes and copying them to another disk might work --
especially if only a few files are invovled (how old the data on the
backup would be would depend on how long it takes to search for
changes). Some UNIX's support disk mirroring -- with something like
that it would only take a few minutes to switch from the backup to the
primary...

I believe DG and IBM both offer systems which are "point of
failure" though I have never used either in "high-availability"
configurations... Doubtless, there are others who offer "reliable"
UNIX.
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Benjamin Z. Golds*