Did you try using a gige interconnect? Philipp Wehrheim wrote:
Hi everbody,I've just created a test setup for my company with two pc's drbd (0.8.3) primary/primary mode with OCFS2 on top of it. the pc's are running suse 10.2 with kernel 2.6.21.2. the Hardware CPU ~1GHz ~12 MBRam and one NIC (100Mbit). The setup is working quite stable and so I started to make some benchmarks and received some strange results: For the benchmark I used a small C-prog "iotest" that, in a loop, open a file write on line and closes the file again. --- #define LOOPCOUNT 1050620 ... for (i=0; i<LOOPCOUNT; i++) { if ( (logFD = open (LOGFILE, O_WRONLY|O_CREAT|O_APPEND, 0666)) != -1) { write (logFD, logMSG, logLEN); close (logFD); } --- 1. write to a ext3-fs | per line | for 1050620 lines | hobbes | 44 nanoseconds | 47.1 seconds | struppi | 37 nanoseconds | 39.3 seconds | 2. write to a OCFS2-fs single -> only one maschiene at the time | per line | for 1050620 lines | hobbes | 84 nanoseconds | 88.3 seconds | struppi | 47 nanoseconds | 50.1 seconds | 3. write to a OCFS2-fs into _ONE_ file -> concurrent write from both pcs | per line | for 1050620 lines | hobbes | 113 milliseconds | 119764 seconds | yes over 33h struppi | 113 milliseconds | 119764 seconds | 4. write to a OCFS2-fs into two files -> each pc into one file | per line | for 1050620 lines | hobbes | 93,6 nanoseconds | 98.6 seconds | struppi | 59,5 nanoseconds | 62.6 seconds | So as one can see OCFS2 does quite good but when it comes to concurrent writes into one file it is sloooooowwwwwwww. The question is now: - is there an error in my setup - how can i tune ocfs2 - how can i tune dlm - WHERE IS THE OCFS2 DOCU???(no im not talking about colorful powerpoint slides) Thanks in advance Philipp _______________________________________________ Ocfs2-users mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-users
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