<div dir="ltr">Hi all:<div>Happy new year!</div><div><br></div><div>I use drbd 8.3.15 now and I find a problem. The drbd sync rate slow down during resync . The initial sync rate will be up to 100MB/s(in gigabyte lan) and become slower and slower during resync . At the end , it will reach to 20MB/s. But after I disconnect it and connect again ,the resync rate will return to 80-100MB/s. There are no other I/O operation during the sync.</div>
<div>Here is my configuration:</div><div><br></div><div><div>resource drbd0 {</div><div> protocol B;</div><div><br></div><div> disk</div><div> {</div><div> on-io-error pass_on;</div><div> no-disk-barrier;</div>
<div> no-disk-flushes;</div><div> }</div><div><br></div><div> syncer</div><div> {</div><div> rate 100M;</div><div> c-plan-ahead 20;</div><div> c-delay-target 100;</div><div>
c-max-rate 400M;</div><div> c-min-rate 2M;</div><div> al-extents 601;</div><div> csums-alg md5;</div><div> verify-alg md5;</div><div> }</div><div><br>
</div><div> net<br></div><div> {</div><div> ping-timeout 30;</div><div> ping-int 5;</div><div> max-epoch-size 8192;</div><div> max-buffers 8912;</div><div> unplug-watermark 131072;</div>
<div> after-sb-0pri discard-zero-changes;</div><div> }</div><div><br></div><div> on ha1 {</div><div> device /dev/drbd0;</div><div> disk /dev/system/omma;</div><div> address <a href="http://172.16.30.111:7700">172.16.30.111:7700</a>;</div>
<div> meta-disk internal;</div><div> }</div><div><div> on peer {</div><div> device /dev/drbd0;</div><div> disk /dev/system/omma;</div><div> address <a href="http://172.16.30.112:7700">172.16.30.112:7700</a>;</div>
<div> meta-disk internal;</div><div> }</div></div></div><div><br></div><div>}</div><div><br></div><div>During the sync operation ,the drbd0's utils% is near to 100%.</div></div>