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From Alex P <apede...@kolosy.com>
Subject Re: couch behavior for san snapshots
Date Mon, 19 Oct 2009 21:37:51 GMT
thanks! i'll definitely look into that.

On Mon, Oct 19, 2009 at 4:32 PM, Glenn Rempe <glenn@rempe.us> wrote:

> Not sure if this will help at all, but I am also using EBS to store a large
> cdb DB.
> It is recommended that the filesystem that you want to snapshot on EBS is
> frozen (or unmounted) if that is possible to help ensure a coherent EBS
> snapshot.
>
> For example, on my mysql and couchdb volumes I use the XFS filesystem which
> has an XFS freeze command which I use to temporarily lock the FS and flush
> it to disk, and then request the snapshot.  You can do this in a script and
> it takes only a few seconds of disk downtime.  I believe writes are cached
> during this period.  I have been using this with mysql but have not yet set
> it up for my couchdb volume.
>
> See :
>
>
> http://developer.amazonwebservices.com/connect/entry.jspa?categoryID=100&externalID=1663
> http://alestic.com/2009/09/ec2-consistent-snapshot
>
> HTH
>
> On Mon, Oct 19, 2009 at 1:55 PM, Chris Anderson <jchris@apache.org> wrote:
>
> > On Mon, Oct 19, 2009 at 12:53 PM, Alex P <apedenko@kolosy.com> wrote:
> > > a simple copy seems to work just fine. db shows up with the right seq
> > number
> > > etc.
> >
> > cool. totally wanna learn about the SAN roundtrip. :)
> >
> > >
> > > On Mon, Oct 19, 2009 at 2:37 PM, Paul Davis <
> paul.joseph.davis@gmail.com
> > >wrote:
> > >
> > >> On Mon, Oct 19, 2009 at 3:35 PM, Alex P <apedenko@kolosy.com> wrote:
> > >> > cdb catalogs databases purely on file name and presence in the
> > >> appropriate
> > >> > directory, right? so if i copy db1 to db1_copy, i should see
> db1_copy
> > >> show
> > >> > up in futon?
> > >>
> > >> Yepper. Make sure the permissions are correct after copying though.
> > >>
> > >> Paul Davis
> > >>
> > >
> >
> >
> >
> > --
> > Chris Anderson
> > http://jchrisa.net
> > http://couch.io
> >
>
>
>
> --
> Glenn Rempe
>
> email                 : glenn@rempe.us
> voice                 : (415) 894-5366 or (415)-89G-LENN
> twitter                : @grempe
> contact info        : http://www.rempe.us/contact.html
> pgp                    : http://www.rempe.us/gnupg.txt
>

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