Re: Migration Off Reiser
Adam Thornton wrote: On Feb 12, 2009, at 9:26 AM, Jack Woehr wrote: Scully, William P wrote: Does anyone know of a document which describes a well-accepted technique for migrating a server's file systems from one format to another? The classic one is to boot off cd and move stuff. If you are booted to a ramdisk and have one file system (e.g., the real hardddrive root file system) mounted as /old and the new filesystem mounted as /new then in the Bourne shell or bash you can do something like: $ cd /old; tar cf - . | (cd /new; tar xf -) Rather than cd, I use -C on the tar command. If you're on a Linux box, though, cp -a does a fine job of preserving file permissions and symlinks and so forth and you don't need the tar. tar xpC /mnt/new does a fine job of preserving stuff. More generally, and not specifically Zed, 1. tar _might_ be faster 2. The tar solution can be enhanced to copy over a network tar . | ssh there tar xp 3. Sometimes, the buffer command might improve things. This might be so if each tar spends time waiting on the other. 4. Sometimes over a network, one might prefer to compress the data. If I were copying from one partition on a disk to another, I'd probably use tar and (if I had it) buffer. However, it'd not discard the possibility of using rsync. On Zed's disks, the choice probably comes down to typing. I would, though, read the man page. There might be a finer point your advisors have overlooked. In general, you can just mount the new filesystem, and then do cp -ax (stay on the same filesystem) for each one you want to copy. The tricky part is, things like databases need to be quiesced first, so you don't end up with inconsistent files, and you don't get a point in time copy. Hence the recommendation for booting from CD/to single- user mode and doing it that way. To put it straight, you don't want anything changing your files while you're copying them. a point in time copy is the best you'd manage, I don't think it would be that good, in the case of a database. Especially if the database comprises more than one file. The only remaining concern I can think of is extended attributes and ACLs. If any of your files have extended attributes or ACLs, you probably want to preserve them. Read the documents for your candidate weapons and see what it says. Until recently, tar and other traditional Unix commands on OS X did not do extended attributes. See also getfattr(1) getfacl(1) -- Cheers John -- spambait 1...@coco.merseine.nu z1...@coco.merseine.nu -- Advice http://webfoot.com/advice/email.top.php http://www.catb.org/~esr/faqs/smart-questions.html http://support.microsoft.com/kb/555375 You cannot reply off-list:-) -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Migration Off Reiser
I believe that Reiser is no longer a preferred file system. Does anyone know of a document which describes a well-accepted technique for migrating a server's file systems from one format to another? Likely we'll be moving (back) to EXT3. Thanks in advance for any pointers! -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Migration Off Reiser
Scully, William P wrote: Does anyone know of a document which describes a well-accepted technique for migrating a server's file systems from one format to another? The classic one is to boot off cd and move stuff. If you are booted to a ramdisk and have one file system (e.g., the real hardddrive root file system) mounted as /old and the new filesystem mounted as /new then in the Bourne shell or bash you can do something like: $ cd /old; tar cf - . | (cd /new; tar xf -) -- Jack J. Woehr# I run for public office from time to time. It's like http://www.well.com/~jax # working out at the gym, you sweat a lot, don't get http://www.softwoehr.com # anywhere, and you fall asleep easily afterwards. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Migration Off Reiser
On Feb 12, 2009, at 9:26 AM, Jack Woehr wrote: Scully, William P wrote: Does anyone know of a document which describes a well-accepted technique for migrating a server's file systems from one format to another? The classic one is to boot off cd and move stuff. If you are booted to a ramdisk and have one file system (e.g., the real hardddrive root file system) mounted as /old and the new filesystem mounted as /new then in the Bourne shell or bash you can do something like: $ cd /old; tar cf - . | (cd /new; tar xf -) If you're on a Linux box, though, cp -a does a fine job of preserving file permissions and symlinks and so forth and you don't need the tar. In general, you can just mount the new filesystem, and then do cp -ax (stay on the same filesystem) for each one you want to copy. The tricky part is, things like databases need to be quiesced first, so you don't end up with inconsistent files, and you don't get a point in time copy. Hence the recommendation for booting from CD/to single- user mode and doing it that way. Adam -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Migration Off Reiser
Hey Scully, the best way we have found is to tar up your data to a file (we use VTS) then just make the new filesystem clean, and untar. 'Where ever you go - There you are!! ' Richard (Gaz) Gasiorowski System z - Linux Product Manager Portfolio Platform Services CSC 3170 Fairview Park Dr., Falls Church, VA 22042 845-773-9243 Work|845-392-7889 Cell|rgasi...@csc.com|www.csc.com This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. Scully, William P william.scu...@ca.com Sent by: Linux on 390 Port LINUX-390@VM.MARIST.EDU 02/12/2009 10:08 AM Please respond to Linux on 390 Port LINUX-390@VM.MARIST.EDU To LINUX-390@VM.MARIST.EDU cc Subject Migration Off Reiser I believe that Reiser is no longer a preferred file system. Does anyone know of a document which describes a well-accepted technique for migrating a server's file systems from one format to another? Likely we'll be moving (back) to EXT3. Thanks in advance for any pointers! -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Migration Off Reiser
Use rsync -- create the ext3 directory (/new) and: rsync -av /old/ /new Be sure and use the trailing / after /old to avoid it creating a /old dir under /new.. There's no way I know of to directly convert a filesystem (other than ext2 to ext3) -- so you'll have to do some type of copy .. the above preserves everything and hasn't failed me yet.. Scott On Thu, Feb 12, 2009 at 8:08 AM, Scully, William P william.scu...@ca.comwrote: I believe that Reiser is no longer a preferred file system. Does anyone know of a document which describes a well-accepted technique for migrating a server's file systems from one format to another? Likely we'll be moving (back) to EXT3. Thanks in advance for any pointers! -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Migration Off Reiser
Hello William and list, I have seen in most recent publication from the IBM Platform Evaluation Team for Linux on system z has documented their approach on page 267 (going by the page number in the document). http://publibz.boulder.ibm.com/epubs/pdf/e0z1p170.pdf That book contains a lot of useful things this list might enjoy. It also talks about converting to disk-by-path. For what it is worth, page 235 to the end is the Linux half of the document. The z/OS stuff is up front. -- Sincerely, Eli M. Dow Ph.D. Student, Software Engineering Computer Science, Clarkson University -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
