cloudstack-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jason Davis <scr...@gmail.com>
Subject Re: what are folks using for replication?
Date Wed, 13 Mar 2013 02:21:12 GMT
Galera MySQL might be an option, depending on how fast the round trip is
between the two sites.

I will confess that I am NOT a fan of Linux HA clustering. I would
recommend doing replication at the MySQL layer. Linux HA clustering is
complex and fragile... Our big LMS at the university runs on such a cluster
(RHEL cluster + DRBD) and its more trouble than its worth. I am working to
hopefully move this to Galera. In our testing it has been way easier and
more resistant to fault.
On Mar 12, 2013 9:00 PM, "Mathias Mullins" <mathias.mullins@citrix.com>
wrote:

> Hi John,
>
> So in a lot of the installations that we have worked with, we are seeing a
> lot of work with DRBD (Active/Standby, Active/Active w/Pacemaker). So far
> it's been one of the better solutions that we have seen installations
> stable with. I think a lot of people would like to see this functionality
> written into ACS to support something in addition to MySQL Master/Slave
> replication.
>
> Personally I like the DRBD solution because it deals with the replication
> at a block level and gives us the flexibility of active/passive and
> active/active ability versus having to do a lot of manual work to revert
> the master/slave relationship.
>
> Thanks,
> Matt
>
>
> On 3/12/13 9:32 PM, "John Kinsella" <jlk@stratosec.co> wrote:
>
> >Thought I'd throw this question out on the list - we're working on
> >geographically (1500 miles) replicated databases for customers who really
> >don't want their stuff to go down.
> >
> >In this particular case, how they've architected their DB schemas means
> >they're really not friendly to the standard transactional replication
> >(this is MSSQL server) so we're looking at replicating the whole block
> >device the db is stored on.
> >
> >We've tried usingÅ 
> > * Ceph -  know it's not meant for geo-repÅ loving it locally, though!
> > * Gluster - When clustering across the WAN, performance was weak. Don't
> >have enough disks/nodes to create a gluster cluster to replicate with
> >gluster-geo-replicate
> > * drbd in active/standby - Fairly decent performance. I hear it'd be
> >better with the drbd-proxy, but don't feel like spending the $$ yet. I've
> >been previously shot in the foot enough times with drbd active/active
> >that I won't try that again.
> >
> >Currently using drbd (I'm pondering writing management of the
> >primary/secondary stuff into ACS) but curious if others have found ways
> >of doing this with ACS that they like?
> >
> >John
> >
> >Stratosec - Secure Infrastructure as a Service
> >o: 415.315.9385
> >@johnlkinsella
> >
>
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message