NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Speeding up rsync
Am about to upgrade some drives in my readynas and was wondering if there was a way to speed up the process.
I had read that speed_limit_max is the throughput ceiling that applies when there is no other activity, limiting the top speed to 200 KB/sec.
Is this changable/supported? Or is there any other way?
5 Replies
Replies have been turned off for this discussion
hi JennC -
Sorry, but what would that solve? I don't see anything in the release notes that would allow me to chagne the dev.raid.speed_limit_max value.
Also, I am pretty sure I can't upgrade the formware while resyncing...
It's 200 MB/sec, not 200 KB/sec. If you're not using all SSDs, then this limit will probably never be hit anyway. If you are using all SSDs, then the limit likely will be hit; but it's there for a reason, so the resync doesn't eat up all the CPU cycles doing parity calculation.
If it was 200MB/sec, it wouldn't take 65 hours to rsync an 8TB drive.
If I do watch cat /proc/mdstat it shows: speed=25780K/sec
Perfect, then that confirms that changing dev.raid.speed_limit_max will make no difference for you. It sounds like it's probably doing a reshape rather than a resync. Reshapes involve a more work than resyncs, and are thus much slower. The 25 MB/sec you are seeing sounds about right.
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
