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From Jason Davis <scr...@gmail.com>
Subject Re: what are folks using for replication?
Date Wed, 13 Mar 2013 02:24:33 GMT
Good article explaining my argument:
http://openlife.cc/blogs/2012/september/failover-evil

TL;DR

Cluster failover sucks.
On Mar 12, 2013 9:21 PM, "Jason Davis" <scr512@gmail.com> wrote:

> 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
>> >
>>
>>

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