Re: [U2] Windows DFS Replication
I have no direct knowledge, but I suspect that the remote differential compression used by DFS would need to examine the entire file to determine changed blocks, and with a non-trivial UV file of a couple of hundred megs, I imagine that the overhead would be LARGE. However, if you were looking at this as a periodic update mechanism for a mirrored server (say, on a nightly basis), rather than attempting real time database replication changes, you might be in business :-) All speculation on my part, and happy to defer to someone with firsthand knowledge, but if you could share an insight to the result you are trying to achieve, others may be able to provide a more accurate response. Ross Ferris Stamina Software Visage Better by Design! -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Jerry Banker Sent: Tuesday, 28 June 2011 8:04 AM To: U2 Users Group Technical Subject: [U2] Windows DFS Replication Is anyone using Windows DFS Replication with UniVerse on Windows Server 2008? Jerry ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] Windows DFS Replication
I don't know that much about it, but DFS replication is still using file block replication not disk level. Also, It may not matter in your environment but it is recommended that the prestaging folder is 10 times the largest replicated file (some say 10 times the largest couple files) to avoid an IO hit. Is RDC true block-level replication? No. RDC is a general purpose protocol for compressing file transfer. DFS Replication uses RDC on blocks at the file level, not at the disk block level. RDC divides a file into blocks. For each block in a file, it calculates a signature, which is a small number of bytes that can represent the larger block. The set of signatures is transferred from server to client. The client compares the server signatures to its own. The client then requests the server send only the data for signatures that are not already on the client. You might check out: http://technet.microsoft.com/en-us/library/cc773238%28WS.10%29.aspx -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Ross Ferris Sent: Tuesday, June 28, 2011 2:51 AM To: U2 Users List Subject: Re: [U2] Windows DFS Replication I have no direct knowledge, but I suspect that the remote differential compression used by DFS would need to examine the entire file to determine changed blocks, and with a non-trivial UV file of a couple of hundred megs, I imagine that the overhead would be LARGE. However, if you were looking at this as a periodic update mechanism for a mirrored server (say, on a nightly basis), rather than attempting real time database replication changes, you might be in business :-) All speculation on my part, and happy to defer to someone with firsthand knowledge, but if you could share an insight to the result you are trying to achieve, others may be able to provide a more accurate response. Ross Ferris Stamina Software Visage Better by Design! -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Jerry Banker Sent: Tuesday, 28 June 2011 8:04 AM To: U2 Users Group Technical Subject: [U2] Windows DFS Replication Is anyone using Windows DFS Replication with UniVerse on Windows Server 2008? Jerry ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
[U2] Verifying file existence
UD 7.1 RHEL Nahant 4 I am looking for an elegant way to verify a file in a remote directory has been created. Because it is a binary file and could be pretty big, I thought OPENing or OPENSEQing it might not be best. I briefly looked at stat within a PCPERFORM but found the @SYSTEM.RETURN.CODE returned 0 whether the file was there or not. Any other ideas? Cheers, Kebbon Irwin ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] Verifying file existence
Since your using RHEL, would you know the actual directory or this file? if so, why not use unix? [george@alpha]$ ls /usr/hello ls: /usr/hello: No such file or directory [george@alpha]$ ls /bin/rm /bin/rm Or you could write a short script that uses the -f flag, and returns a YES or NO this way, you don't have to worry about the OS changing the wording of an error. if [ -f $1 ] ; then echo YES else echo NO fi -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users- boun...@listserver.u2ug.org] On Behalf Of Kebbon Irwin Sent: Tuesday, June 28, 2011 12:54 PM To: u2-users@listserver.u2ug.org Subject: [U2] Verifying file existence UD 7.1 RHEL Nahant 4 I am looking for an elegant way to verify a file in a remote directory has been created. Because it is a binary file and could be pretty big, I thought OPENing or OPENSEQing it might not be best. I briefly looked at stat within a PCPERFORM but found the @SYSTEM.RETURN.CODE returned 0 whether the file was there or not. Any other ideas? Cheers, Kebbon Irwin ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] Verifying file existence
Or you could simply do it like this: :ED USER.PROGRAMS RH.TEST Top of RH.TEST in USER.PROGRAMS, 9 lines, 230 characters. *--: P 001: FILEPATH=./D_VOC 002: CMD = if [ -e :FILEPATH: ]; then echo yes; else echo no; fi; 003: PCPERFORM CMD CAPTURING OUTPUT 004: PRINT OUTPUT=:OUTPUT 005: IF INDEX(OUTPUT, yes, 1) THEN 006:PRINT FILE EXISTS 007: END ELSE 008:PRINT NO FILE THERE 009: END Bottom. *--: EX Quit RH.TEST in file USER.PROGRAMS unchanged. :RUN USER.PROGRAMS RH.TEST OUTPUT=yes FILE EXISTS -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of George Gallen Sent: Tuesday, June 28, 2011 10:16 AM To: U2 Users List Subject: Re: [U2] Verifying file existence Since your using RHEL, would you know the actual directory or this file? if so, why not use unix? [george@alpha]$ ls /usr/hello ls: /usr/hello: No such file or directory [george@alpha]$ ls /bin/rm /bin/rm Or you could write a short script that uses the -f flag, and returns a YES or NO this way, you don't have to worry about the OS changing the wording of an error. if [ -f $1 ] ; then echo YES else echo NO fi -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users- boun...@listserver.u2ug.org] On Behalf Of Kebbon Irwin Sent: Tuesday, June 28, 2011 12:54 PM To: u2-users@listserver.u2ug.org Subject: [U2] Verifying file existence UD 7.1 RHEL Nahant 4 I am looking for an elegant way to verify a file in a remote directory has been created. Because it is a binary file and could be pretty big, I thought OPENing or OPENSEQing it might not be best. I briefly looked at stat within a PCPERFORM but found the @SYSTEM.RETURN.CODE returned 0 whether the file was there or not. Any other ideas? Cheers, Kebbon Irwin ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] Verifying file existence
Perfect! Thanks guys. Cheers, Kebbon From: robert.hou...@fwic.net To: u2-users@listserver.u2ug.org Date: Tue, 28 Jun 2011 10:17:23 -0700 Subject: Re: [U2] Verifying file existence Or you could simply do it like this: :ED USER.PROGRAMS RH.TEST Top of RH.TEST in USER.PROGRAMS, 9 lines, 230 characters. *--: P 001: FILEPATH=./D_VOC 002: CMD = if [ -e :FILEPATH: ]; then echo yes; else echo no; fi; 003: PCPERFORM CMD CAPTURING OUTPUT 004: PRINT OUTPUT=:OUTPUT 005: IF INDEX(OUTPUT, yes, 1) THEN 006:PRINT FILE EXISTS 007: END ELSE 008:PRINT NO FILE THERE 009: END Bottom. *--: EX Quit RH.TEST in file USER.PROGRAMS unchanged. :RUN USER.PROGRAMS RH.TEST OUTPUT=yes FILE EXISTS -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of George Gallen Sent: Tuesday, June 28, 2011 10:16 AM To: U2 Users List Subject: Re: [U2] Verifying file existence Since your using RHEL, would you know the actual directory or this file? if so, why not use unix? [george@alpha]$ ls /usr/hello ls: /usr/hello: No such file or directory [george@alpha]$ ls /bin/rm /bin/rm Or you could write a short script that uses the -f flag, and returns a YES or NO this way, you don't have to worry about the OS changing the wording of an error. if [ -f $1 ] ; then echo YES else echo NO fi -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users- boun...@listserver.u2ug.org] On Behalf Of Kebbon Irwin Sent: Tuesday, June 28, 2011 12:54 PM To: u2-users@listserver.u2ug.org Subject: [U2] Verifying file existence UD 7.1 RHEL Nahant 4 I am looking for an elegant way to verify a file in a remote directory has been created. Because it is a binary file and could be pretty big, I thought OPENing or OPENSEQing it might not be best. I briefly looked at stat within a PCPERFORM but found the @SYSTEM.RETURN.CODE returned 0 whether the file was there or not. Any other ideas? Cheers, Kebbon Irwin ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] Verifying file existence
Unidata on Windows version, change one line: CMD = 'if exist ':FILEPATH:' (echo yes) else (echo no)' -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Kebbon Irwin Sent: Tuesday, June 28, 2011 11:53 AM To: u2-users@listserver.u2ug.org Subject: Re: [U2] Verifying file existence Perfect! Thanks guys. Cheers, Kebbon From: robert.hou...@fwic.net To: u2-users@listserver.u2ug.org Date: Tue, 28 Jun 2011 10:17:23 -0700 Subject: Re: [U2] Verifying file existence Or you could simply do it like this: :ED USER.PROGRAMS RH.TEST Top of RH.TEST in USER.PROGRAMS, 9 lines, 230 characters. *--: P 001: FILEPATH=./D_VOC 002: CMD = if [ -e :FILEPATH: ]; then echo yes; else echo no; fi; 003: PCPERFORM CMD CAPTURING OUTPUT 004: PRINT OUTPUT=:OUTPUT 005: IF INDEX(OUTPUT, yes, 1) THEN 006:PRINT FILE EXISTS 007: END ELSE 008:PRINT NO FILE THERE 009: END Bottom. *--: EX Quit RH.TEST in file USER.PROGRAMS unchanged. :RUN USER.PROGRAMS RH.TEST OUTPUT=yes FILE EXISTS -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of George Gallen Sent: Tuesday, June 28, 2011 10:16 AM To: U2 Users List Subject: Re: [U2] Verifying file existence Since your using RHEL, would you know the actual directory or this file? if so, why not use unix? [george@alpha]$ ls /usr/hello ls: /usr/hello: No such file or directory [george@alpha]$ ls /bin/rm /bin/rm Or you could write a short script that uses the -f flag, and returns a YES or NO this way, you don't have to worry about the OS changing the wording of an error. if [ -f $1 ] ; then echo YES else echo NO fi -Original Message- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users- boun...@listserver.u2ug.org] On Behalf Of Kebbon Irwin Sent: Tuesday, June 28, 2011 12:54 PM To: u2-users@listserver.u2ug.org Subject: [U2] Verifying file existence UD 7.1 RHEL Nahant 4 I am looking for an elegant way to verify a file in a remote directory has been created. Because it is a binary file and could be pretty big, I thought OPENing or OPENSEQing it might not be best. I briefly looked at stat within a PCPERFORM but found the @SYSTEM.RETURN.CODE returned 0 whether the file was there or not. Any other ideas? Cheers, Kebbon Irwin ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
Re: [U2] Verifying file existence
FYI - For Universe users out there, you can use the READV...0 (zero) trick: OPENPATH /some/remote/directory TO FILE ELSE ABORT READV SCRAP FROM FILE, large-binary-filename, 0 THEN IS.CREATED = @TRUE END ELSE IS.CREATED = @FALSE END (Don't know if it works on Unidata) rex On Tue, Jun 28, 2011 at 12:54 PM, Kebbon Irwin kebbon.ir...@sympatico.ca wrote: UD 7.1 RHEL Nahant 4 I am looking for an elegant way to verify a [large binary] file in a remote directory has been created. ___ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
