You can adjust the mdadm rebuild rate pretty easily. By default it's quite slow to avoid causing strain on system resources.
See #1 at https://www.cyberciti.biz/tips/linux-raid-increase-resync-rebuild-speed.html On Wed, Apr 10, 2024 at 10:36 AM Alessandro Baggi < [email protected]> wrote: > Hi list, > I'm trying on a spare machine dm-integrity with mdadm raid1. > This is an old machine (i7-2600k). I'm using 2x500GB wd caviar black SATA3. > > I'm trying to run some test and see how much performance changes using > dm-integrity. > > First I created a raid1 with mdadm and checked the performances and > writing 50G I got 100 MB/s > > Then I destroied the md device and on every disk I run: > > # integritysetup format --integrity xxhash64 /dev/sdb1 > # integritysetup format --integrity xxhash64 /dev/sdc1 > > During this process the performances was good ~95MB/s. > After this I opened the devices with: > > # integritysetup open integrity xxhash64 /dev/sdb1 sdb1 > # integritysetup open integrity xxhash64 /dev/sdc1 sdc1 > > and created the mdadm array with: > > # mdadm --create /dev/md10 --level=raid1 --raid-devices=2 > /dev/mapper/sdb1 /dev/mapper/sdc1 > > and reading on /proc/mdstat I got this: > > [>....................] resync = 1.1% (4929792/443175424) > finish=677.3min speed=10782K/sec > > Why there is so big drop on speed during the sync? > > I'm missing something? > > I'll need 11 hours to sync 2x500GB hdd? Why so slow? > > Before this I tried the same on a newer machine with i7 8700k and 2x2TB > WD gold and I get a drop sync speed at ~35MB/s. > > There is something that I can do to improve this? > > Thank you in advance. > > Alessandro. > _______________________________________________ > AlmaLinux Users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > -- Jonathan Wright AlmaLinux Foundation Mattermost: chat <https://chat.almalinux.org/almalinux/messages/@jonathan>
