[ceph-users] Re: Combining erasure coding and replication?

2020-06-17 Thread Brett Randall
Hi Darren The buildings are connected by fibre, currently with equipment running at 40gbps, soon to be 100gbps, with sub-millisecond latency, so if the data is getting pulled from either building it's not a massive issue, as long as the cluster can stay operational if an entire building goes

[ceph-users] Re: Combining erasure coding and replication?

2020-06-10 Thread Darren Soothill
Hi Brett, So how far apart are your buildings and what is the network connectivity between the buildings? I am going to assume they are close and you have lots of bandwidth. There are a couple of options depending on the protocol and the distance between the buildings. You could build an EC

[ceph-users] Re: Combining erasure coding and replication?

2020-03-27 Thread Simon Oosthoek
SD? >> >> Best regards, >> >> ===== >> Frank Schilder >> AIT Risø Campus >> Bygning 109, rum S14 >> >> >> From: Eugen Block >> Sent: 27 March 2020 08:33:45 >> To: ceph-users@ce

[ceph-users] Re: Combining erasure coding and replication?

2020-03-27 Thread Lars Täuber
Hi Brett, I'm far from being an expert, but you may consider rbd-mirroring between EC-pools. Cheers, Lars Am Fri, 27 Mar 2020 06:28:02 + schrieb Brett Randall : > Hi all > > Had a fun time trying to join this list, hopefully you don’t get this message > 3 times! > > On to Ceph… We are

[ceph-users] Re: Combining erasure coding and replication?

2020-03-27 Thread Eugen Block
109, rum S14 From: Eugen Block Sent: 27 March 2020 08:33:45 To: ceph-users@ceph.io Subject: [ceph-users] Re: Combining erasure coding and replication? Hi Brett, Our concern with Ceph is the cost of having three replicas. Storage may be cheap but I’d rather not buy ANOTHER 5pb

[ceph-users] Re: Combining erasure coding and replication?

2020-03-27 Thread Frank Schilder
ygning 109, rum S14 From: Eugen Block Sent: 27 March 2020 08:33:45 To: ceph-users@ceph.io Subject: [ceph-users] Re: Combining erasure coding and replication? Hi Brett, > Our concern with Ceph is the cost of having three replicas. Storage > may be c

[ceph-users] Re: Combining erasure coding and replication?

2020-03-27 Thread Eugen Block
Hi Brett, Our concern with Ceph is the cost of having three replicas. Storage may be cheap but I’d rather not buy ANOTHER 5pb for a third replica if there are ways to do this more efficiently. Site-level redundancy is important to us so we can’t simply create an erasure-coded volume