I have some further questions concerning the allocation groups. You mentioned that the typical number of allocation group is 65-128, and the minimum size of them is 8K blocks or 32MB. But how are the AGs physically located? Does it physically mark the JFS volume into (let say) 128 ?sub-partitions?? And let new files opened and written to different ?sub-partition??
As I mentioned, the experiment I run on nearly constant file size is excellent. How about variable size files? If files of variable size grow in the AGs and there are regular deletions, how would JFS deal with the potential fragmentation? Finally, you mentioned blocks of 4KB is allocated to growing files. Is there any internal fragmentation problem to file extents? Will it allocate more space than required to avoid external fragmentation? Thanks! -- View this message in context: http://www.nabble.com/Some-more-questions%2C-preallocation-tf440979.html#a5284680 Sent from the JFS - General forum at Nabble.com. ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Jfs-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jfs-discussion
