Thanks Ramon. Do you know why some of your mds were created with bitmaps and others were not? When I installed Ubuntu 16.04 and used the installer to create a RAID1 some of the mds had bitmaps and some did not. Thanks, Pete -----Original Message----- From: Ramon Hofer [mailto:ramonhofer@xxxxxxxxxx] Sent: Friday, October 14, 2016 9:30 AM To: Peter Sangas; linux-raid@xxxxxxxxxxxxxxx Subject: Re: "bitmap" line in /proc/mdstat On 14/10/16 18:08, Peter Sangas wrote: > Can you quantify the performance decrease and if rebuild time is not as important as performance how does one remove the bitmap? From the Linux RAID wiki: "Some limited measurements I have done suggest up to 10% slowdown, though usually less. Possibly some tuning can make it much better." [1] [1] https://raid.wiki.kernel.org/index.php/Write-intent_bitmap#How_Bitmaps_Work_by_Q.26A Regards, Ramon -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
