[Samba] Copying files between 2 samba serv with ACL in mind using winbind database - solution?
Hi The question how to copy files and preserve ACLs appears from time to time but I have not find the right (stable and working) solution so far on this list and on the other Internet sites. So after some thinking I have 'discovered' my own solution. But what is the situation. I have old samba 3.0.24 (debian) on old computer. Now there is new computer with new samba 3.5.6 (debian 6.x). Both are working as domain member servers (in the same domain). The problem is: copy files form old to new server keeping in mind that there are 100 users with their ACLs on the files. I'm using winbindd. There are of course different UID-SID mappings on those servers so the solutions are two (IMHO): 1. Somehow set the new server mappings on the copied files or 2. Transfer the mappings itself from old to new server Ad.1 It is possible using some windows station to copy all the files from one server to another. But it is a bit extra work and time consuming. Ad.2 Use whatever linux copy tools (tar etc) to copy files. Faster but here is the problem I have faced. First I have dumped winbindd_idmap.tdb mapping on oldserver: net idmap dump /var/lib/samba/winbindd_idmap.tdb idmap_dump.txt copied this file to new server and restored it: net idmap restore /var/lib/samba/winbindd_idmap.tdb idmap_dump.txt during this restore operation the following errors (warnings?) appeared: ignoring invalid line [] . ignoring invalid line [BB] . Why? What does it mean? Ignore or it is serious? Looking at the dumped file it seems to be ok. So I have tried other solution, just copied the database file winbindd_idmap.tdb from old to new server. After flushing the samba cache net cache flush and restarting winbind the ACLs appeared to be the same on both servers. So after untaring the files from old server it just started to work. But my question: is it safe to do it the way I did it? The fields in databases tends to change so I have no idea if winbindd_idmap.tdb on the samba 3.0 is the same as on the 3.5? Regards Piotr -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
[Samba] Copying Files from XP to Samba (help needed)
I am still desperately trying to figure out why I get such a horrible performance trying to copy files from XP to Samba (below is my original post to illustrate the context. Meanwhile, I found a pretty remarkable pattern in the network traces. Generally, the packets send from the XP machine look like this: 01: WriteAndXRequest 60 kBytes (1392 bytes payload) 02: 1460 bytes ...(usual time delta between 2 packets 0.0001 secs) 42: 1460 bytes delta: 0.05 - 0.3 secs 43: last 188 bytes .. WriteAndXResponse from Samba machine, da capo It seems like what is slowing the transfer down so dramatically, is the long gap before the last 188 bytes are sent. I can't see anything reasonable the XP machine could be waiting for - it already got the ack for the last preceding packet. To emphasize again, this is not a general networking problem between the 2 machines; it only (at leas AFAIK) occurs when copying large files from Windows XP to Samba shares (and at that occasion I could reproduce it with all the Samba servers and XP clients that I checked so far) Any help would be greatly appreciated. Regards, Peter Daum I noted an extremely poor performance when copying big files from a windows xp client to a samba share. The exact version of samba does not seem to matter: I tried several different samba servers with versions between 3.014 and 3.0.23b running on Linux 2.4.32 and 2.6.17 (machines and network otherwise idle, clients connected via fast ethernet, servers via Gbit; network performance in both directions around 95 Mbit/s). I made several tests copying a 1GB file with Windows 98 and Windows XP clients. Reading the file from the server takes predictably around 105 seconds (~9.75 MB/s). Writing to the server takes only slightly longer on Win98 (130 seconds, ~8 MB/s) while the same takes approximately 45 minutes from a XP client (I don't know whether this matters, I noted that on the XP write test, the directory listing on the server immediately shows a file with the final size - obviously a sparse file, repeatedly invoking du shows the gradually increasing actual size). I wrote a little test program that just writes data to a file and shows the throughput; the transfer rates I get that way are pretty reasonable, so it is not a general problem but something that only occurs on specific operations like copying. Tracing the network traffic also didn't tell me what the problem might be: XP uses for copying as well as for other write operations WriteAndXRequest, the only peculiarity I noticed is the slightly exotic block size of 61440 bytes per request when copying (which also doesn't seem to be the problem - Win98 uses the same block size with WriteRaw) Has anybody else made similar experiences? (Since I could see this issue with differently configured servers/clients, it should not be just my personal problem. Of course in most settings where the data usually goes mostly from the server to the client it is not obvious) Any ideas what's going on and what to do about it? -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba
Re: [Samba] Copying Files from XP to Samba (help needed)
I am also having performance problems writing to a Samba share (see previous post about tcpdump) and I have seen a strange phenomenon: if I start tcpdump on the Samba machine, performance increases 20 times. It would be interesting to know if you also experience the same, just start tcpdump and redirect output to /dev/null while/before copying files. Regards, Daniel Lindgren 2006/10/9, Peter Daum [EMAIL PROTECTED]: I am still desperately trying to figure out why I get such a horrible performance trying to copy files from XP to Samba (below is my original post to illustrate the context. Meanwhile, I found a pretty remarkable pattern in the network traces. Generally, the packets send from the XP machine look like this: 01: WriteAndXRequest 60 kBytes (1392 bytes payload) 02: 1460 bytes ...(usual time delta between 2 packets 0.0001 secs) 42: 1460 bytes delta: 0.05 - 0.3 secs 43: last 188 bytes .. WriteAndXResponse from Samba machine, da capo It seems like what is slowing the transfer down so dramatically, is the long gap before the last 188 bytes are sent. I can't see anything reasonable the XP machine could be waiting for - it already got the ack for the last preceding packet. To emphasize again, this is not a general networking problem between the 2 machines; it only (at leas AFAIK) occurs when copying large files from Windows XP to Samba shares (and at that occasion I could reproduce it with all the Samba servers and XP clients that I checked so far) Any help would be greatly appreciated. Regards, Peter Daum I noted an extremely poor performance when copying big files from a windows xp client to a samba share. The exact version of samba does not seem to matter: I tried several different samba servers with versions between 3.014 and 3.0.23b running on Linux 2.4.32 and 2.6.17 (machines and network otherwise idle, clients connected via fast ethernet, servers via Gbit; network performance in both directions around 95 Mbit/s). I made several tests copying a 1GB file with Windows 98 and Windows XP clients. Reading the file from the server takes predictably around 105 seconds (~9.75 MB/s). Writing to the server takes only slightly longer on Win98 (130 seconds, ~8 MB/s) while the same takes approximately 45 minutes from a XP client (I don't know whether this matters, I noted that on the XP write test, the directory listing on the server immediately shows a file with the final size - obviously a sparse file, repeatedly invoking du shows the gradually increasing actual size). I wrote a little test program that just writes data to a file and shows the throughput; the transfer rates I get that way are pretty reasonable, so it is not a general problem but something that only occurs on specific operations like copying. Tracing the network traffic also didn't tell me what the problem might be: XP uses for copying as well as for other write operations WriteAndXRequest, the only peculiarity I noticed is the slightly exotic block size of 61440 bytes per request when copying (which also doesn't seem to be the problem - Win98 uses the same block size with WriteRaw) Has anybody else made similar experiences? (Since I could see this issue with differently configured servers/clients, it should not be just my personal problem. Of course in most settings where the data usually goes mostly from the server to the client it is not obvious) Any ideas what's going on and what to do about it? -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba
[Samba] Copying files and asscoiated ACL's
Hi, I've set up the last release of Samba (3.0.2rc1) in order to join an Active Directory domain. Everything OK, but when it comes to copying files with xcopy file samba-file /o (preserve ACL's with the W2003 Server xcopy) I get an 'Access Denied' Error. I've seen this is an old issue, and has to do with the SID to UID mappings winbind does. The error I get is: [2004/01/29 18:28:45, 3] smbd/posix_acls.c:unpack_nt_owners(918) unpack_nt_owners: unable to validate owner sid for S-1-5-32-544 Does anybody know something about that? -- Jacinto Trillo Pérez -- To unsubscribe from this list go to the following URL and read the instructions: http://lists.samba.org/mailman/listinfo/samba
[Samba] Copying Files
For some reason when I try to copy some files from a windows machine to a samba share on a particular Linux server it creates the filename on the share and then gives me the following error: This folder already contains a file named foo.exe Would you like to replace the existing file which is 0 bytes with this one which is 13.4mb It does not do this with all files. I copied two different iso files that are approximately 650mb fine several times but I have tried with exe files and some work while some do not. -- To unsubscribe from this list go to the following URL and read the instructions: http://lists.samba.org/mailman/listinfo/samba
Re: [Samba] Copying Files
Hi TJ Davis, you wrote: For some reason when I try to copy some files from a windows machine to a samba share on a particular Linux server it creates the filename on the share and then gives me the following error: This folder already contains a file named foo.exe Would you like to replace the existing file which is 0 bytes with this one which is 13.4mb very old bug - try updating to the last stable version 2.2.7a. der tom -- To unsubscribe from this list go to the following URL and read the instructions: http://lists.samba.org/mailman/listinfo/samba
[Samba] Copying Files
For some reason when I try to copy some files from a windows machine to a samba share on a particular Linux server it creates the filename on the share and then gives me the following error: This folder already contains a file named foo.exe Would you like to replace the existing file which is 0 bytes with this one which is 13.4mb It does not do this with all files. I copied two different iso files that are approximately 650mb fine several times but I have tried with exe files and some work while some do not. -- To unsubscribe from this list go to the following URL and read the instructions: http://lists.samba.org/mailman/listinfo/samba
[Samba] copying files to windows - permissions, time
I use Samba to access a Windows 98 box from linux. When I copy a file from linux to win98, there are two annoying problems: - it complains it cannot set permissions on the new file on windows - it should logically ignore all such errors (the FAT volumes mounted in fstab can have a quiet option for this, but it does not work for smbfs volumes). - the new file gets current date and time, instead of the original file's date and time. I've searched through manuals but found nothing about how to fix these annoyances. Please help! -- __ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup Free price comparison tool gives you the best prices and cash back! http://www.bestbuyfinder.com/download.htm -- To unsubscribe from this list go to the following URL and read the instructions: http://lists.samba.org/mailman/listinfo/samba
