Just curious how much pg you are using /osd? 250? Istvan Szabo Senior Infrastructure Engineer --------------------------------------------------- Agoda Services Co., Ltd. e: istvan.szabo@xxxxxxxxx<mailto:istvan.szabo@xxxxxxxxx> --------------------------------------------------- On 2022. May 2., at 18:11, Eugen Block <eblock@xxxxxx> wrote: Email received from the internet. If in doubt, don't click any link nor open any attachment ! ________________________________ Hi, You have 2 or 4 osd/disk? no such thing, only one OSD per HDD (with DB on SSD). Zitat von "Szabo, Istvan (Agoda)" <Istvan.Szabo@xxxxxxxxx>: You have 2 or 4 osd/disk? Istvan Szabo Senior Infrastructure Engineer --------------------------------------------------- Agoda Services Co., Ltd. e: istvan.szabo@xxxxxxxxx<mailto:istvan.szabo@xxxxxxxxx> --------------------------------------------------- On 2022. May 2., at 15:59, Eugen Block <eblock@xxxxxx> wrote: Email received from the internet. If in doubt, don't click any link nor open any attachment ! ________________________________ Just to update this thread, apparently you were right, we did hit the limit of mon_max_pg_per_osd * osd_max_pg_per_osd_hard_ratio (250 * 3 = 750), this was found in the logs: 2022-04-06 14:24:55.256 7f8bb5a0e700 1 osd.8 43377 maybe_wait_for_max_pg withhold creation of pg 75.56s16: 750 >= 750 This message first came up for the last up OSD on that host after all other OSDs were purged and then again for the first up after the rebuild. I'm currently playing around with the osdmaptool, I have a feeling that this could also be an issue in newer releases, but that is just speculation at the moment. As a workaround we'll increase osd_max_pg_per_osd_hard_ratio to 5 and see how the next attempt will go. Thanks, Eugen Zitat von Josh Baergen <jbaergen@xxxxxxxxxxxxxxxx>: On Wed, Apr 6, 2022 at 11:20 AM Eugen Block <eblock@xxxxxx> wrote: I'm pretty sure that their cluster isn't anywhere near the limit for mon_max_pg_per_osd, they currently have around 100 PGs per OSD and the configs have not been touched, it's pretty basic. How is the host being "rebuilt"? Depending on the CRUSH rule, if the host's OSDs are all marked destroyed and then re-created one at a time with normal weight, CRUSH may decide to put a large number of PGs on the first OSD that is created, and so on, until the rest of the host's OSDs are available to take those OSDs. Josh _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx ________________________________ This message is confidential and is for the sole use of the intended recipient(s). It may also be privileged or otherwise protected by copyright or other legal rules. If you have received it by mistake please let us know by reply email and delete it from your system. It is prohibited to copy this message or disclose its content to anyone. Any confidentiality or privilege is not waived or lost by any mistaken delivery or unauthorized disclosure of the message. All messages sent to and from Agoda may be monitored to ensure compliance with company policies, to protect the company's interests and to remove potential malware. Electronic messages may be intercepted, amended, lost or deleted, or contain viruses. ________________________________ This message is confidential and is for the sole use of the intended recipient(s). It may also be privileged or otherwise protected by copyright or other legal rules. If you have received it by mistake please let us know by reply email and delete it from your system. It is prohibited to copy this message or disclose its content to anyone. Any confidentiality or privilege is not waived or lost by any mistaken delivery or unauthorized disclosure of the message. All messages sent to and from Agoda may be monitored to ensure compliance with company policies, to protect the company's interests and to remove potential malware. Electronic messages may be intercepted, amended, lost or deleted, or contain viruses. _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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