Re: [zfs-discuss] Proposal: multiple copies of user data

2006-09-12 Thread Neil A. Wilson
Matthew Ahrens wrote: Matthew Ahrens wrote: Here is a proposal for a new 'copies' property which would allow different levels of replication for different filesystems. Thanks everyone for your input. The problem that this feature attempts to address is when you have some data that is more im

Re: [zfs-discuss] Proposal: multiple copies of user data

2006-09-12 Thread Neil A. Wilson
Darren J Moffat wrote: While encryption of existing data is not in scope for the first ZFS crypto phase I am being careful in the design to ensure that it can be done later if such a ZFS "framework" becomes available. The biggest problem I see with this is one of observability, if not all of

[zfs-discuss] Compression with fixed record sizes

2006-08-22 Thread Neil A. Wilson
Do both compression and fixed record sizes work together? Our Directory Server uses a fixed page size (8KB by default) for database records, so I'm in the habit of setting the ZFS recordsize to equal the database page size. However, we also typically use compression because it often helps imp

Re: [zfs-discuss] ZFS questions

2006-06-17 Thread Neil A. Wilson
Darren Reed wrote: Solid state disk often has a higher failure rate than normal disk and a limited write cycle. Hence it is often desirable to try and redesign the filesystem to do fewer writes when it is on (for example) compact flash, so moving "hot blocks" to fast storage can have consequence