<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>Hi,<br><br>i have two identical servers equipped with 10 GigE cards. MTU is set to 9000 and with iperf i got over 9 Gbit/s over my network connection. The servers are directly connected. The disks (10x 2 TB SATA, RAID 6) are quite fast. I got about 700 MB/s write speed with drbd standalone. With drbd connected the write speed drops to about 150 MB/s. The sync-rate is at about 290 MB/s. Why is my write speed so slow?<br><br>Here is my drbd.conf:<br><br>global {<br> usage-count no;<br>}<br><br>common {<br> protocol A;<br> syncer { rate 900M; al-extents 3833; }<br> net { max-buffers 8192; }<br>}<br><br>resource r0 {<br> on brick1.myserver.com {<br> device /dev/drbd0;<br> disk
/dev/sdb1;<br> address 10.22.23.10:7789;<br> flexible-meta-disk /dev/sdc1;<br> }<br> on brick2.myserver.com {<br> device /dev/drbd0;<br> disk /dev/sdc1;<br> address 10.22.23.11:7789;<br> flexible-meta-disk /dev/sdb1;<br> }<br>}<br><br>Any ideas? Thanks for your help!<br><br>Best regards,<br>Felix<br><br></div>
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