Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Le 21/01/2016 11:59, Rudolf Kasper a écrit : > Hi, > > i got a question. We've got a setup with three nics. One of them is cross-over > and only for drbd use. So i expect that we can replicate 120M/s over this nic > constantly. But when i transfer some files to the drbd device i see sometimes > traffic on the device and sometimes not. I got a adaptec 6405 and write-caching > is disabled so this couldn't be the clue. OS is debian 8. When i'm looking into > iotop i can see total disk write, but only sometimes there is a peak of actual > disk write, after this peak the nic generates traffic. > > Is there a disk-cache running? How can i check this and disable it? You also have a cache on OS level. Perhaps some kind of delayed write ? Di you tried to run : # sync on the copying node ? You can also make a test with : # dd if=/dev/zero of=/drbdvolume/testfile bs=1G count=1 oflag=direct Of course, change /drbdvolume/ with mountpoint of your drbd device. Julien -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 3705 bytes Desc: Signature cryptographique S/MIME URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20160122/97dd7a3a/attachment.bin>