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[Linux-cluster] some naive questions



Hi all,
I have some naive questions regarding GFS and distributed file systems in general.
1. Can anyother distributed file system other than GFS/OCFS2 be used over GNBD? What are the chief differences between GFS and OCFS2?
2. when space is allocated for a file in GFS , does it do in such a way that it equalises space utilisation among the storage nodes? Which are the file i should  see for understanding the general data-distribution algorithm used in GFS?
3. Given the recent advent of flash memories are there any "distributed-log structured" file system like Zebra, xFs(paper Serverless network file system ) that are developed lately?
thanks,
Mugunthan


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