Re: [Jfs-discussion] maximum filesystem size limit
On Wed, Oct 09, 2002 at 12:25:24PM +0200, Roy Sigurd Karlsbakk wrote: > > > > Can someone please tell me if I can use JFS to create a single 12TB > > > > filesystem under Linux? > > > > > > Afaik, you have a problem here concerning the Linux 2.4 maximum block > > > device size of 2TB. > > > > is this "fixed" in 2.5 yet? > > I beleive so No, not Linus 2.5. It is in Andrew Morton's -mm tree though. That should mean that after some heavy pounding on the code (what else would you expect from akpm?) it will probably be in 2.5-linus soon... ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
On Wednesday 09 October 2002 16:26, Dave Kleikamp wrote: > A sparse file could be as big as 16 TB on jfs. Sectors don't affect the > file offset. The limitation here is the page cache. hm how do you put a 16TB file on a 2TB filesystem? -- Roy Sigurd Karlsbakk, Datavaktmester ProntoTV AS - http://www.pronto.tv/ Tel: +47 9801 3356 Computers are like air conditioners. They stop working when you open Windows. ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
On Wednesday 09 October 2002 09:24, Roy Sigurd Karlsbakk wrote: > On Wednesday 09 October 2002 16:16, Steve Best wrote: > > On a 32-bit machine, the file size is limited to 16 TB. (This is > > also the maximum size of the volume.) This is due to constraints > > in the Linux kernel. On a 64-bit machine, the file size can be as > > big as 4 PB (2^52). > > nope. 2TB is the maximum file- and block device size, as the maximum > number of sectors is 2^32 and a sector is 512 bytes large A sparse file could be as big as 16 TB on jfs. Sectors don't affect the file offset. The limitation here is the page cache. -- David Kleikamp IBM Linux Technology Center ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
On Wednesday 09 October 2002 16:16, Steve Best wrote: > Cameron Bahar wrote: > >I need support for a single 12 TB filesystem on Linux. The documentation > >indicates that JFS supports a theoretical 4PB limit, but that other > >limitations (32 bit offsets) within limit prevent scaling to this large > >size. > > > >Can someone please tell me if I can use JFS to create a single 12TB > >filesystem under Linux? > > On a 32-bit machine, the file size is limited to 16 TB. (This is also > the maximum size of the volume.) This is due to constraints in the > Linux kernel. On a 64-bit machine, the file size can be as big as 4 PB > (2^52). nope. 2TB is the maximum file- and block device size, as the maximum number of sectors is 2^32 and a sector is 512 bytes large roy -- Roy Sigurd Karlsbakk, Datavaktmester ProntoTV AS - http://www.pronto.tv/ Tel: +47 9801 3356 Computers are like air conditioners. They stop working when you open Windows. ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
On Wednesday 09 October 2002 09:16, Steve Best wrote: > On a 32-bit machine, the file size is limited to 16 TB. (This is > also the maximum size of the volume.) This is due to constraints in > the Linux kernel. On a 64-bit machine, the file size can be as big > as 4 PB (2^52). Steve, As Jens stated, without the sector_t patch, volumes are limited to 2TB on 32-bit hardware. Shaggy -- David Kleikamp IBM Linux Technology Center ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
Cameron Bahar wrote: >I need support for a single 12 TB filesystem on Linux. The documentation >indicates that JFS supports a theoretical 4PB limit, but that other >limitations (32 bit offsets) within limit prevent scaling to this large >size. > >Can someone please tell me if I can use JFS to create a single 12TB >filesystem under Linux? On a 32-bit machine, the file size is limited to 16 TB. (This is also the maximum size of the volume.) This is due to constraints in the Linux kernel. On a 64-bit machine, the file size can be as big as 4 PB (2^52). Steve ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
On Wed, Oct 09 2002, Roy Sigurd Karlsbakk wrote: > > > > Can someone please tell me if I can use JFS to create a single 12TB > > > > filesystem under Linux? > > > > > > Afaik, you have a problem here concerning the Linux 2.4 maximum block > > > device size of 2TB. > > > > is this "fixed" in 2.5 yet? > > I beleive so why reply if you are only guessing? status of 2.5 64-bit sector_t patches looks promising, will likely end up on 2.5 soonish. -- Jens Axboe ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
On Wed, 2002-10-09 at 22:53, Roy Sigurd Karlsbakk wrote: > On Tuesday 08 October 2002 23:14, Cameron Bahar wrote: > > I need support for a single 12 TB filesystem on Linux. The documentation > > indicates that JFS supports a theoretical 4PB limit, but that other > > limitations (32 bit offsets) within limit prevent scaling to this large > > size. > > > > Can someone please tell me if I can use JFS to create a single 12TB > > filesystem under Linux? > > Afaik, you have a problem here concerning the Linux 2.4 maximum block device > size of 2TB. is this "fixed" in 2.5 yet? ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
> > > Can someone please tell me if I can use JFS to create a single 12TB > > > filesystem under Linux? > > > > Afaik, you have a problem here concerning the Linux 2.4 maximum block > > device size of 2TB. > > is this "fixed" in 2.5 yet? I beleive so -- Roy Sigurd Karlsbakk, Datavaktmester ProntoTV AS - http://www.pronto.tv/ Tel: +47 9801 3356 Computers are like air conditioners. They stop working when you open Windows. ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
Re: [Jfs-discussion] maximum filesystem size limit
On Tuesday 08 October 2002 23:14, Cameron Bahar wrote: > I need support for a single 12 TB filesystem on Linux. The documentation > indicates that JFS supports a theoretical 4PB limit, but that other > limitations (32 bit offsets) within limit prevent scaling to this large > size. > > Can someone please tell me if I can use JFS to create a single 12TB > filesystem under Linux? Afaik, you have a problem here concerning the Linux 2.4 maximum block device size of 2TB. Anyone that knows if there's a workaround for this using LVM or something? roy -- Roy Sigurd Karlsbakk, Datavaktmester ProntoTV AS - http://www.pronto.tv/ Tel: +47 9801 3356 Computers are like air conditioners. They stop working when you open Windows. ___ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
