Re: [ClusterLabs] DRBD or SAN ?

2017-07-17 Thread Digimer
On 2017-07-17 03:07 PM, Chris Adams wrote: > Once upon a time, Ian said: >> I think a big advantage compared to native replication is that DRBD offers >> synchronous replication at the block level as opposed to the transaction >> level. > > However, just like RAID is

Re: [ClusterLabs] DRBD or SAN ?

2017-07-17 Thread Chris Adams
Once upon a time, Ian said: > I think a big advantage compared to native replication is that DRBD offers > synchronous replication at the block level as opposed to the transaction > level. However, just like RAID is not a replacement for backups, DRBD is IMHO not a

Re: [ClusterLabs] DRBD or SAN ?

2017-07-17 Thread Ian
DRBD is absolutely compatible with mysql/postgres. In my experience, with a 10G pipe for block replication, there's also basically no performance degradation compared to native disk writes, even with an SSD array. > I've always favored native replication over disk replication for databases. I'm

Re: [ClusterLabs] DRBD or SAN ?

2017-07-17 Thread Digimer
On 2017-07-17 05:51 AM, Lentes, Bernd wrote: > Hi, > > i established a two node cluster with two HP servers and SLES 11 SP4. I'd > like to start now with a test period. Resources are virtual machines. The > vm's reside on a FC SAN. The SAN has two power supplies, two storage > controller, two

Re: [ClusterLabs] DRBD or SAN ?

2017-07-17 Thread Ken Gaillot
On 07/17/2017 04:51 AM, Lentes, Bernd wrote: > Hi, > > i established a two node cluster with two HP servers and SLES 11 SP4. I'd > like to start now with a test period. Resources are virtual machines. The > vm's reside on a FC SAN. The SAN has two power supplies, two storage > controller, two

Re: [ClusterLabs] DRBD or SAN ?

2017-07-17 Thread Dmitri Maziuk
On 7/17/2017 4:51 AM, Lentes, Bernd wrote: I'm asking myself if a DRBD configuration wouldn't be more redundant and high available. ... Is DRBD in conjuction with a database (MySQL or Postgres) possible ? Have you seen https://github.com/ewwhite/zfs-ha/wiki ? -- I recently deployed one

Re: [ClusterLabs] did anyone manage to combine ClusterMon RA with HP systems insight manager ? - SOLVED

2017-07-17 Thread Lentes, Bernd
- On Jul 11, 2017, at 7:25 PM, Bernd Lentes bernd.len...@helmholtz-muenchen.de wrote: > Hi, > > i established a two node cluster and i'd like to start now a test period with > some not very important resources. > I'd like to monitor the cluster via SNMP, so i realize if he's e.g.

[ClusterLabs] DRBD or SAN ?

2017-07-17 Thread Lentes, Bernd
Hi, i established a two node cluster with two HP servers and SLES 11 SP4. I'd like to start now with a test period. Resources are virtual machines. The vm's reside on a FC SAN. The SAN has two power supplies, two storage controller, two network interfaces for configuration. Each storage

Re: [ClusterLabs] Antw: Re: Problem with stonith and starting services

2017-07-17 Thread Cesar Hernandez
> El 17 jul 2017, a las 8:02, Ulrich Windl > escribió: > > Hi! > > Could this mean the stonith-timeout is signioficantly larger than the time > for a complete reboot? So the fenced node would be up again when the cluster > thinks the fencing has just

[ClusterLabs] Antw: Re: Problem with stonith and starting services

2017-07-17 Thread Ulrich Windl
Hi! Could this mean the stonith-timeout is signioficantly larger than the time for a complete reboot? So the fenced node would be up again when the cluster thinks the fencing has just completed. Regards, Ulrich P.S: Sorry for the late reply; I was offline for a while... >>> Cesar Hernandez