[ceph-users] Re: Fwd: large concurrent rbd operations block for over 15 mins!

2019-10-23 Thread Mark Nelson
ceph-users] Re: Fwd: large concurrent rbd operations block for over 15 mins! Out of curiosity, when you chose EC over replication how did you weigh IOPS vs space amplification in your decision making process? I'm wondering if we should prioritize EC latency vs other tasks in future tuning efforts (

[ceph-users] Re: Fwd: large concurrent rbd operations block for over 15 mins!

2019-10-23 Thread Frank Schilder
bject: [ceph-users] Re: Fwd: large concurrent rbd operations block for over 15 mins! Out of curiosity, when you chose EC over replication how did you weigh IOPS vs space amplification in your decision making process? I'm wondering if we should prioritize EC latency vs other tasks in futu

[ceph-users] Re: Fwd: large concurrent rbd operations block for over 15 mins!

2019-10-22 Thread Mark Nelson
Out of curiosity, when you chose EC over replication how did you weigh IOPS vs space amplification in your decision making process?  I'm wondering if we should prioritize EC latency vs other tasks in future tuning efforts (it's always a tradeoff deciding what to focus on). Thanks, Mark On 1

[ceph-users] Re: Fwd: large concurrent rbd operations block for over 15 mins!

2019-10-22 Thread Frank Schilder
Getting decent RBD performance is not a trivial exercise. While at a first glance 61 SSDs for 245 clients sounds more or less OK, it does come down to a bit more than that. The first thing is, how to get SSD performance out of SSDs with ceph. This post will provide very good clues and might alr