[ceph-users] Three tier cache

2016-10-21 Thread Robert Sanders
Hello, Is it possible to create a three level cache tier? Searching documentation and archives suggests that I’m not the first one to ask about it, but I can’t tell if it is supported yet. Thanks, Rob ___ ceph-users mailing list ceph-users@lists.ce

Re: [ceph-users] Three tier cache

2016-10-23 Thread Robert Sanders
>> >> Is it possible to create a three level cache tier? Searching documentation >> and archives suggests that I’m not the first one to ask about >> it, but I can’t tell if it is supported yet. > > At this time, this is not possible. I'm afraid I'm not aware of any short > term plans for this

Re: [ceph-users] cache tiering deprecated in RHCS 2.0

2016-10-23 Thread Robert Sanders
> On Oct 23, 2016, at 4:32 AM, Nick Fisk wrote: > > Unofficial answer but I suspect it is probably correct. > > Before Jewel (and later hammer releases), cache tiering reduced performance > in pretty much all cases. In it’s current state does this still hold true? I’ve been spending a lot

Re: [ceph-users] How is split brain situations handled in ceph?

2016-10-26 Thread Robert Sanders
If your clustering something important do it at the application level. For example financial transactions are replicated at the application level just for this reason. As far as Ceph I'm not an expert yet. Even with all the file system wizardry in the world some things need to be handled outsi

Re: [ceph-users] 10Gbit switch advice for small ceph cluster upgrade

2016-10-27 Thread Robert Sanders
Arista has been good to us. Netgear or eBay if you have to scrape bottom. Rob Sent from my iPhone > On Oct 27, 2016, at 9:16 AM, Oliver Dzombic wrote: > > Hi, > > i can recommand > > X710-DA2 > > 10G Switch is going over our bladeinfrastructure, so i can't recommand > something for you the