[ceph-users] Re: OSD based ec-code

2021-09-14 Thread Szabo, Istvan (Agoda)
- Agoda Services Co., Ltd. e: istvan.sz...@agoda.com --- -Original Message- From: David Orman Sent: Tuesday, September 14, 2021 8:55 PM To: Eugen Block Cc: ceph-users Subject: [ceph-users] Re: OSD based ec-code Email received from the int

[ceph-users] Re: OSD based ec-code

2021-09-14 Thread David Orman
-- > Agoda Services Co., Ltd. > e: istvan.sz...@agoda.com > --- > > -Original Message- > From: David Orman > Sent: Tuesday, September 14, 2021 8:55 PM > To: Eugen Block > Cc: ceph-users > Subject: [ceph-u

[ceph-users] Re: OSD based ec-code

2021-09-14 Thread David Orman
Keep in mind performance, as well. Once you start getting into higher 'k' values with EC, you've got a lot more drives involved that need to return completions for operations, and on rotational drives this becomes especially painful. We use 8+3 for a lot of our purposes, as it's a good balance of e

[ceph-users] Re: OSD based ec-code

2021-09-14 Thread Eugen Block
Hi, consider yourself lucky that you haven't had a host failure. But I would not draw the wrong conclusions here and change the failure-domain based on luck. In our production cluster we have an EC pool for archive purposes, it all went well for quite some time and last Sunday one of the ho