So perhaps we'll need to change the OSD to allow for 500 or 1000 PGs
We had a support case last year where we where forced to set the OSD limit to >4000 for a few days, and had more then 4k active PGs on that single OSD. You can do that, however it is quite uncommon. -- Martin Verges Managing director Mobile: +49 174 9335695 E-Mail: martin.verges@croit.io Chat: https://t.me/MartinVerges croit GmbH, Freseniusstr. 31h, 81247 Munich CEO: Martin Verges - VAT-ID: DE310638492 Com. register: Amtsgericht Munich HRB 231263 Web: https://croit.io YouTube: https://goo.gl/PGE1Bx On Sat, 13 Mar 2021 at 14:29, Dan van der Ster <dan@vanderster.com> wrote:
On Fri, Mar 12, 2021 at 6:35 PM Robert Sander <r.sander@heinlein-support.de> wrote:
Am 12.03.21 um 18:30 schrieb huxiaoyu@horebdata.cn:
Any other aspects on the limits of bigger capacity hard disk drives?
Recovery will take longer increasing the risk of another failure in the same time.
Another limitation is that OSDs should store 100 PGs each regardless of their size, so those PGs will each need to store many more objects and therefore recovery, scrubbing, removal, listing, etc... will all take longer and longer.
So perhaps we'll need to change the OSD to allow for 500 or 1000 PGs per OSD eventually, (meaning also that PGs per cluster needs to scale up too!)
Cheers, Dan
Regards -- Robert Sander Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin
http://www.heinlein-support.de
Tel: 030 / 405051-43 Fax: 030 / 405051-19
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