Hi, It depends on the user scenario. I suggest choose the approximate cluster size with the most files. And you should also consider the volume size support, for example, 4K cluster will only support 16TB volume, while 1M cluster can support 4PB. BTW, no matter 4kb or 20kb files, they are always occupy 128kb in your ocfs2 volume. If file size is less than about 3.8kb, it will use inline data feature which stores data together with inode and won't allocate new data cluster. Thanks, Joseph On 2016/5/16 15:52, Umarzuki Mochlis wrote:> What is the best way for me to reformat my ocfs LUN because I got > complains that 4kb files become 0kb and 20kb files become 128kb. The > partition when reaching 80% usage, it will become not writable > anymore. It is a LVM2 logical volume. > > Format command used: > > sudo mkfs.ocfs2 -b 4K -C 128K -L "Web Cluster" /dev/webvg/weblv > > Thanks for any advise > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users at oss.oracle.com > https://oss.oracle.com/mailman/listinfo/ocfs2-users > >
Any document that have details about what you have explained so I can refer to? Thanks. 2016-05-16 17:07 GMT+08:00 Joseph Qi <joseph.qi at huawei.com>:> Hi, > It depends on the user scenario. I suggest choose the approximate > cluster size with the most files. And you should also consider the > volume size support, for example, 4K cluster will only support 16TB > volume, while 1M cluster can support 4PB. > BTW, no matter 4kb or 20kb files, they are always occupy 128kb in your > ocfs2 volume. If file size is less than about 3.8kb, it will use inline > data feature which stores data together with inode and won't allocate > new data cluster. > > Thanks, > Joseph > > On 2016/5/16 15:52, Umarzuki Mochlis wrote: >> What is the best way for me to reformat my ocfs LUN because I got >> complains that 4kb files become 0kb and 20kb files become 128kb. The >> partition when reaching 80% usage, it will become not writable >> anymore. It is a LVM2 logical volume. >> >> Format command used: >> >> sudo mkfs.ocfs2 -b 4K -C 128K -L "Web Cluster" /dev/webvg/weblv >> >> Thanks for any advise >> >> _______________________________________________ >> Ocfs2-users mailing list >> Ocfs2-users at oss.oracle.com >> https://oss.oracle.com/mailman/listinfo/ocfs2-users >> >> > >