Re: [zfs-discuss] Zero page reclaim with ZFS

On 12/29/2008 10:36 PM, Tim wrote: > > > On Mon, Dec 29, 2008 at 8:52 PM, Torrey McMahon > wrote: > > On 12/29/2008 8:20 PM, Tim wrote: > > I run into the same thing but once I say, "I can add more space > without downtime" they tend to smarten up. Also, ZFS

Re: [zfs-discuss] Zero page reclaim with ZFS

On Mon, Dec 29, 2008 at 8:52 PM, Torrey McMahon wrote: > On 12/29/2008 8:20 PM, Tim wrote: > > I run into the same thing but once I say, "I can add more space without > downtime" they tend to smarten up. Also, ZFS will not reuse blocks in a, for > lack of better words, economical fashion. If you

Re: [zfs-discuss] Zero page reclaim with ZFS

Torrey McMahon wrote: > On 12/29/2008 8:20 PM, Tim wrote: > >> On Mon, Dec 29, 2008 at 6:09 PM, Torrey McMahon > > wrote: >> >> >> There are some mainframe filesystems that do such things. I think >> there >> was also an STK array - Iceberg[?] - that had s

Re: [zfs-discuss] Zero page reclaim with ZFS

On 12/29/2008 8:20 PM, Tim wrote: > > > On Mon, Dec 29, 2008 at 6:09 PM, Torrey McMahon > wrote: > > > There are some mainframe filesystems that do such things. I think > there > was also an STK array - Iceberg[?] - that had similar functionality. > Howe

Re: [zfs-discuss] Zero page reclaim with ZFS

On Mon, Dec 29, 2008 at 6:09 PM, Torrey McMahon wrote: > > There are some mainframe filesystems that do such things. I think there > was also an STK array - Iceberg[?] - that had similar functionality. > However, why would you use ZFS on top of HDP? If the filesystem lets you > grow dynamically,

Re: [zfs-discuss] Zero page reclaim with ZFS

Cyril Payet wrote: >> Hello there, >> Hitachi USP-V (sold as 9990V by Sun) provides thin provisioning, >> known as Hitachi Dynamic Provisioning (HDP). >> This gives a way to make the OS believes that a huge lun is >> available whilst its size is not physically allocated on the >> DataSystem side

Re: [zfs-discuss] Zero page reclaim with ZFS

On Mon, 29 Dec 2008 19:17:27 +, Andrew Gabriel wrote: >Out of curiosity, is there any filesystem which >zeros blocks as they are freed up? The native filesystem of the Fujitsu Siemens mainframe operating system "BS2000/OSD" does that: - if a file is deleted with the DELETE-FILE command,

Re: [zfs-discuss] Zero page reclaim with ZFS

Cyril Payet wrote: Hello there, Hitachi USP-V (sold as 9990V by Sun) provides thin provisioning, known as Hitachi Dynamic Provisioning (HDP). This gives a way to make the OS believes that a huge lun is available whilst its size is not physically allocated on the DataSystem side.

[zfs-discuss] Zero page reclaim with ZFS

Hello there, Hitachi USP-V (sold as 9990V by Sun) provides thin provisioning, known as Hitachi Dynamic Provisioning (HDP). This gives a way to make the OS believes that a huge lun is available whilst its size is not physically allocated on the DataSystem side. A simple example : 100Gb seen by the O