Personal tools
You are here: Home Forums-old Dispersed Storage Users Multiple hard drives
Document Actions

Multiple hard drives

Up to Dispersed Storage Users

Multiple hard drives

Posted by Dylan T at August 24. 2008
My Slice-servers have 2 drives. How will data be stored to them?
Is there a partitioning scheme recommended?
Can I define what drive to write to?

Re: Multiple hard drives

Posted by ivolvovski at August 26. 2008

Dylan,


This part of the system goes through enhancements and you probably are referring to 1.0. The same concept exists in upcoming 1.5 reelase, but there will be  configuration changes that should be explained in release notes and examples.

As of 1.0 slice server configuration file contains a section that defines storage per vault type. A section <ss:vault-type> contains 1 or more <eval:param> called partition-definition. Each partition defines a data-path and capacity. The intent is to utilize multiple disk drives for storage, though nothing prevents one from having more than a single partition on a drive. data-path parameter defines an absolute path to a root point on a file system where all data files containing slices would be stored. The slice store software would make sure that no more that partition allocated capacity is used. The structure underneath root point is maintained by Cleversafe software.

In your particular case you would likely create 2 partitions. You would decide how much space you'd like to allocate for storage and create directories under which Slice Server would maintain data slices files for vaults.

1.5 supports file vault in addition to block vault, which means that
you would have native access to a file system through new interfaces.In 1.5 release the notion of partition is generalized. It is definedregardless of type of storage that is utilized for a particular vault type.

Future releases would make Slice storage management more dynamic.

If you need more details please let us know.


Ilya


Re: Multiple hard drives

Posted by Dylan T at August 28. 2008
1.5??? Do you mean 1.1? Or is 1.5 in the works?

Thanks for the explanation. I think I may just stripe both drives with RAID and have one large partition. I think that may give me a higher write time anyway. If one drive goes out I can just replace it and rebuild that slice-server. each of my servers also have a small separate drive for the OS.

Re: Multiple hard drives

Posted by ivolvovski at August 29. 2008

No, I didn't mistyped. We changed our numbering schema and it would be more consistent. I asked our marketing people to post in our blog explanations and preliminary plans for release dates. This should hopefully answer your question and provide generally better idea of what to expect and what could come in the nearest future. Stay tuned.


Ilya


Powered by Ploneboard