| Issue 22: | File type not mentioned in the policy file | |
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What if the administrator does not provide tier information about any particular file type, user or group ? This is a very common scenario. The administator cannot predict the file types any user may create at the time of configuration. We can provide three solutions to it: -> We can allow the file to be placed on any tier. The default inode and block allocation strategy of the file system will be used in this case. -> We can ask the adminstrator to assign a particular tier where those files will be placed. The OHSM inode and block allocater will return error if there is no space on the specified tier. -> we can ask the administrator to assign a sequence of tiers where the OHSM inode and block allocater will try to allocate the file. The OHSM inode and block allocater will then try to assign space to the file in a sequential manner and will return error only when there is no space on all the tiers specified. The final solution: -> We will follow the first solution as it is more suitable. -> The second solution is discarded because a user should not be disallowed to make files just because the administrator could not predict the file type. -> The third solution can be seen as a future enhancement
Dec 28, 2008
Project Member
#1
sneha.hendre@gmail.com
Dec 28, 2008
If admin is not aware of file types of a user then he can simply apply UID policy. i.e the admin is aware of the importance of the users, he can specify a high cost disk for a developer while a lower cost disk for a store manager. So i suggest that we have already provided provision for situations like this, that's why we have different policies, right, and the admin should be aware of the file types that users are working on, so its for the admin to decide which policy he would enforce.
Jan 2, 2009
well Rishi, i think we should go for the first solution. If the user fails to specify the tier_id for particular file then let the file be allocated by normal ext2 allocation i.e. the file can be allocated to any tier within the span of file system.
Status:
Review-Req
Jan 14, 2009
Well, close the issue if its nor relevant. Atleast update it !!!
Jan 14, 2009
(No comment was entered for this change.)
Cc:
-fscops -sandeepksinha -rohitvashist2kk3 -imreckless -sneha.hendre -postrishi -checkout.vineet
Jan 14, 2009
We are going by the first solution i.e. if the file does not qualify under any policy then normal ext2 allocation algorithm will be applied
Status:
Done
Cc: fscops sandeepksinha imreckless checkout.vineet sneha.hendre bharati.alatgi rohitvashist2kk3 Labels: -Type-Other Type-Info |
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