Hi Am Mi, 2007-02-21 um 18.54 schrieb Sunil Mushran: > And you are convinced that drdb's primary-primary is not the > cause for the slowdown. ?? Yes, writing a file is fast. Reading a file has no influence on drbd.
We noticed, that reading a big file on one node while the other node opened that file in RW mode but without writing anything is still fast. If the writing node writes slowly to the file (e.g. a logline per second) reading from the other node is also fast. As soon as the writing speed increases (e.g. a logline per 1/3 second) reading blocks. While tcpdumping all these scenarios we noticed, that the blocking scenario produces much more connections (ocfs2 protocol). Finally we tried to buffer the write operations and flushing it each second. The result was, that writing many loglines per second did not block the reading process on the other node. cheers Egon _______________________________________________ Ocfs2-users mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-users
