Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thursday 24 July 2008 06:16:30 am Lars Ellenberg wrote: > whenever drbd "data-integrity-alg" comparison fails, > drbd disconnects, reconnects, and does a resync. > > if you get that frequently, you basically have a degraded cluster. Aha, I see. > if you turn tcp checksum offloading off, thus have the tcp checksum > cover in-kernel-memory to in-kernel-memory, any transfer errors in > between (catched by the tcp checksum, which may be too weak to > catch all of them -- but then you have a different problem anyways) > cause a tcp resent, which is completely transparent to drbd. This sounds like a good first step. I've disabled checksum offloading on the interface. If online verification continues to find mismatched blocks with any regularity, I'll add data-integrity-alg as well. Thank you, Jeffrey