Hello, Reading Lustre Manual (section 33. System Limits) i could not find an answer to my problem.
I am tring to create a 50GB testfile on my lustre file system using dd. After 37GB (which is the max size of one of my OST), dd is stopping complaining about FREE SPACE!!! [EMAIL PROTECTED] ~]# uname -rm 2.6.18-53.1.14.el5_lustre.1.6.5.1smp i686 [EMAIL PROTECTED] ~]# Before dd usage: [EMAIL PROTECTED] ~]# lfs df -h UUID bytes Used Available Use% Mounted on testfs-MDT0000_UUID 130.4G 460.0M 122.5G 0% /mnt/lustre[MDT:0] testfs-OST0000_UUID 18.3G 1.4G 16.0G 7% /mnt/lustre[OST:0] testfs-OST0001_UUID 18.3G 444.5M 17.0G 2% /mnt/lustre[OST:1] testfs-OST0002_UUID 36.7G 448.5M 34.4G 1% /mnt/lustre[OST:2] testfs-OST0003_UUID 36.7G 448.5M 34.4G 1% /mnt/lustre[OST:3] filesystem summary: 110.0G 2.7G 101.7G 2% /mnt/lustre [EMAIL PROTECTED] ~]# So, i have 101GB free -> start dd and create a 50GB file on /mnt/lustre: [EMAIL PROTECTED] ~]# dd if=/dev/zero of=/mnt/lustre/test2.img bs=100M count=500 dd: writing `/mnt/lustre/test2.img': No space left on device 352+0 records in 351+0 records out 36909240320 bytes (37 GB) copied, 3496.8 seconds, 10.6 MB/s [EMAIL PROTECTED] ~]# list again free space usage: [EMAIL PROTECTED] ~]# lfs df -h UUID bytes Used Available Use% Mounted on testfs-MDT0000_UUID 130.4G 460.0M 122.5G 0% /mnt/lustre[MDT:0] testfs-OST0000_UUID 18.3G 1.4G 16.0G 7% /mnt/lustre[OST:0] testfs-OST0001_UUID 18.3G 444.5M 17.0G 2% /mnt/lustre[OST:1] testfs-OST0002_UUID 36.7G 34.8G 4.0M 94% /mnt/lustre[OST:2] testfs-OST0003_UUID 36.7G 448.5M 34.4G 1% /mnt/lustre[OST:3] filesystem summary: 110.0G 37.1G 67.4G 33% /mnt/lustre [EMAIL PROTECTED] ~]# As you see, testfs-OST0002_UUID is full, but on /mnt/lustre I have enough free space - 67GB (on other OSTs) in order to allow dd to continue and create my file. How can i avoid dd to stop and allow it to continue to complete on other OSTs? Regards, Alx _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
