Re: UNIX nice Command Good/Bad
Not sure if this has been mentioned some where, but it used to be that UNIX would lower priority of processes that had accumulated a lot of CPU time. So the Oracle Background processes would get lower priority over time. Stopping and starting an instance will fix this again ;-) Cary Millsap wrote: Anything that an OS does to raise or lower process priority without the Oracle kernel's knowing is a bad thing. Example: An inefficient process called L that makes way too many cache buffer chains acquisitions is demoted (niced to a less important priority). An important job called H that needs some of the same latches is promoted (niced to a more important priority). L, which gets some user-mode CPU time in spite of its poor priority, works long enough to acquire a latch, and then it gets preempted. Now, when H needs the same latch that L is holding, H will consume lots of CPU spinning for the latch, but of course H can never obtain the latch until L releases it. But L is asleep most of the time because it has a low priority. You'll have a busy-looking system (high CPU utilization because of H's spinning), but nobody will be able to get anything done. When the Oracle kernel provides process prioritization or suspend/resume capabilities, it'll be fantastic (I think they advertise some of this stuff in 9i, but I'm not sure it works yet). But no OS can do the job unless it takes into account some of the things that Oracle is doing internally. Cary Millsap Hotsos Enterprises, Ltd. http://www.hotsos.com Upcoming events: - Hotsos Clinic, Oct 1-3 San Francisco, Oct 15-17 Dallas, Dec 9-11 Honolulu - 2003 Hotsos Symposium on OracleR System Performance, Feb 9-12 Dallas - Next event: NCOAUG Training Day, Aug 16 Chicago -Original Message- Ethan Sent: Tuesday, August 06, 2002 5:23 PM To: Multiple recipients of list ORACLE-L There is an article on Metalink that talks about doing this and doesn't mention the problem but I will take your word over that. Another post on usenet talked about some different software available on particular operating systems that would do the smae thing as nice but I guess it does is a little more nicley. Would this be safe? How about punishing the whole lot and forcing all processes with a particular database to run at a lower level? Ethan Post (972) 577-6552 [EMAIL PROTECTED] perotdba (AIM), epost1 (Yahoo) -Original Message- Sent: Tuesday, August 06, 2002 4:28 PM To: Multiple recipients of list ORACLE-L Still true. Cary Millsap Hotsos Enterprises, Ltd. http://www.hotsos.com Upcoming events: - Hotsos Clinic, Oct 1-3 San Francisco, Oct 15-17 Dallas, Dec 9-11 Honolulu - 2003 Hotsos Symposium on OracleR System Performance, Feb 9-12 Dallas - Next event: NCOAUG Training Day, Aug 16 Chicago -Original Message- Ethan Sent: Tuesday, August 06, 2002 3:58 PM To: Multiple recipients of list ORACLE-L Is this still true? * WARNING: do not run Oracle processes at different priority by altering the nice value. This is specifically warned against in the manuals. If you have a process with a lowered priority that obtains a lock on an object, then can't run because of the low priority, you will create a deadlock or hang situation. All Oracle processes should run at the same priority. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Anjo Kolk INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: UNIX nice Command Good/Bad
Anjo - The way that I would put it is that the operating system (any multitasking o.s.) must make a decision on which process to give which processor next and for how long. It is more complex than the o.s. just picking the highest priority process from the run queue (processes that are available to run, not waiting for I/O for example). Each o.s. vendor has its own proprietary decision process. The o.s. lowering the priority of a process that has accumulated a lot of CPU time is one factor. The priority figure is one way to make provide some visibility of a single aspect of this decision process. Tru64 tracks the nice value in addition to priority. Some vendors do better at this than others. One sign of doing a better job is being able to scale to more processors. I took a C.S. class in operating systems years ago and the main thing I came away with was: 1. It isn't simple. 2. Most vendors configure their system pretty well as delivered. 3. It is better to change the priority factors in your application before you try changing the operating system's parameters. 4. If you decide to change something, just change one thing at a time and measure the effect. This is as much as I can recall today. Dennis Williams DBA Lifetouch, Inc. [EMAIL PROTECTED] -Original Message- Sent: Thursday, August 08, 2002 3:26 PM To: Multiple recipients of list ORACLE-L Not sure if this has been mentioned some where, but it used to be that UNIX would lower priority of processes that had accumulated a lot of CPU time. So the Oracle Background processes would get lower priority over time. Stopping and starting an instance will fix this again ;-) Cary Millsap wrote: Anything that an OS does to raise or lower process priority without the Oracle kernel's knowing is a bad thing. Example: An inefficient process called L that makes way too many cache buffer chains acquisitions is demoted (niced to a less important priority). An important job called H that needs some of the same latches is promoted (niced to a more important priority). L, which gets some user-mode CPU time in spite of its poor priority, works long enough to acquire a latch, and then it gets preempted. Now, when H needs the same latch that L is holding, H will consume lots of CPU spinning for the latch, but of course H can never obtain the latch until L releases it. But L is asleep most of the time because it has a low priority. You'll have a busy-looking system (high CPU utilization because of H's spinning), but nobody will be able to get anything done. When the Oracle kernel provides process prioritization or suspend/resume capabilities, it'll be fantastic (I think they advertise some of this stuff in 9i, but I'm not sure it works yet). But no OS can do the job unless it takes into account some of the things that Oracle is doing internally. Cary Millsap Hotsos Enterprises, Ltd. http://www.hotsos.com Upcoming events: - Hotsos Clinic, Oct 1-3 San Francisco, Oct 15-17 Dallas, Dec 9-11 Honolulu - 2003 Hotsos Symposium on OracleR System Performance, Feb 9-12 Dallas - Next event: NCOAUG Training Day, Aug 16 Chicago -Original Message- Ethan Sent: Tuesday, August 06, 2002 5:23 PM To: Multiple recipients of list ORACLE-L There is an article on Metalink that talks about doing this and doesn't mention the problem but I will take your word over that. Another post on usenet talked about some different software available on particular operating systems that would do the smae thing as nice but I guess it does is a little more nicley. Would this be safe? How about punishing the whole lot and forcing all processes with a particular database to run at a lower level? Ethan Post (972) 577-6552 [EMAIL PROTECTED] perotdba (AIM), epost1 (Yahoo) -Original Message- Sent: Tuesday, August 06, 2002 4:28 PM To: Multiple recipients of list ORACLE-L Still true. Cary Millsap Hotsos Enterprises, Ltd. http://www.hotsos.com Upcoming events: - Hotsos Clinic, Oct 1-3 San Francisco, Oct 15-17 Dallas, Dec 9-11 Honolulu - 2003 Hotsos Symposium on OracleR System Performance, Feb 9-12 Dallas - Next event: NCOAUG Training Day, Aug 16 Chicago -Original Message- Ethan Sent: Tuesday, August 06, 2002 3:58 PM To: Multiple recipients of list ORACLE-L Is this still true? * WARNING: do not run Oracle processes at different priority by altering the nice value. This is specifically warned against in the manuals. If you have a process with a lowered priority that obtains a lock on an object, then can't run because of the low priority, you will create a deadlock or hang situation. All Oracle processes should run at the same priority. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Anjo Kolk INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858)
Re: Unix at command ???
Janet, From the command line type man at and you will see the correct format to enter a at string. The basic format is at -f file_to_execute HH:MM This will execute the file at the time specified if the time is in the future. If the time is in the past it will take the next occurrence of the time(tomorrow). You can also use the MMDDYY in the string to specify the date to execute the file. at is used for a one time execution of a command. If you would like the command to execute at a set repetition use cron ROR mª¿ªm Janet Linsy janetlinsy@ya To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] hoo.com cc: Sent by: Subject: Unix at command ??? [EMAIL PROTECTED] om 04/02/02 03:14 PM Please respond to ORACLE-L Hi all, I'd like to run a file (r2) at 15:10 Apr 2. Below was what I did and I could not get out of at normally. /export/home/oracle/test$ at 15:10 Apr 2 at r2 at EOF at EOF at EOT at EOT at ^Z[19] + Stopped (SIGTSTP)at 15:10 Apr 2 I tried EOF according to the on-line doc, and also tried EOT, but none works. Finally I used Control Z to get out of at. I was out, but the script file didn't run. So what's the correct syntax to run the command at a specific date, time? Thank you! Janet __ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Janet Linsy INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Ron Rogers INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Unix at command ???
Hi all, I'd like to run a file (r2) at 15:10 Apr 2. Below was what I did and I could not get out of at normally. /export/home/oracle/test$ at 15:10 Apr 2 at r2 at EOF at EOF at EOT at EOT at ^Z[19] + Stopped (SIGTSTP)at 15:10 Apr 2 I tried EOF according to the on-line doc, and also tried EOT, but none works. Finally I used Control Z to get out of at. I was out, but the script file didn't run. So what's the correct syntax to run the command at a specific date, time? Thank you! Janet __ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Janet Linsy INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Unix at command ???
try control-C or a period or a control-D On Tue, 2 Apr 2002, Janet Linsy wrote: Hi all, I'd like to run a file (r2) at 15:10 Apr 2. Below was what I did and I could not get out of at normally. /export/home/oracle/test$ at 15:10 Apr 2 at r2 at EOF at EOF at EOT at EOT at ^Z[19] + Stopped (SIGTSTP)at 15:10 Apr 2 I tried EOF according to the on-line doc, and also tried EOT, but none works. Finally I used Control Z to get out of at. I was out, but the script file didn't run. So what's the correct syntax to run the command at a specific date, time? Thank you! Janet __ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Janet Linsy INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Alex INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Unix at command ???
Try Control-D when you are done inputting your commands Brian P. MacLean Oracle DBA, OCP8i Janet Linsy janetlinsy@ya To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] hoo.com cc: Sent by: Subject: Unix at command ??? [EMAIL PROTECTED] om 04/02/02 03:14 PM Please respond to ORACLE-L Hi all, I'd like to run a file (r2) at 15:10 Apr 2. Below was what I did and I could not get out of at normally. /export/home/oracle/test$ at 15:10 Apr 2 at r2 at EOF at EOF at EOT at EOT at ^Z[19] + Stopped (SIGTSTP)at 15:10 Apr 2 I tried EOF according to the on-line doc, and also tried EOT, but none works. Finally I used Control Z to get out of at. I was out, but the script file didn't run. So what's the correct syntax to run the command at a specific date, time? Thank you! Janet __ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Janet Linsy INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
OT: Unix tee command
I do not understand the difference between these two commands: script_file log_file script_file | tee log_file As I understand, the first runs and redirects its standard output to a log file. The second runs and pipes its standard output to the tee command, which copies its standard input into its standard output. I have been instructed to use the latter, but dont want to do it blindly without understanding why. Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Erik Williams INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Unix tee command
The tee command simply does what you say: it writes a copy to a file as well as writing it to the console. You could get a similar result by tail -f log_file script_file log_file Are you writing a script that needs to have two stream outputs? Or is it important that you watch the script as it runs? If so, then your method makes sense. HTH, g -Original Message- Sent: Wednesday, July 11, 2001 3:12 PM To: Multiple recipients of list ORACLE-L I do not understand the difference between these two commands: script_file log_file script_file | tee log_file As I understand, the first runs and redirects its standard output to a log file. The second runs and pipes its standard output to the tee command, which copies its standard input into its standard output. I have been instructed to use the latter, but dont want to do it blindly without understanding why. Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Guy Hammond INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Unix tee command
The TEE command basically duplicates the output. It sends a copy to the file specified and a copy to the standard output. This is the difference in just redirecting it. When you redirect it, none goes to standard out, just to the file specified. -Original Message- Sent: Wednesday, July 11, 2001 9:12 AM To: Multiple recipients of list ORACLE-L I do not understand the difference between these two commands: script_file log_file script_file | tee log_file As I understand, the first runs and redirects its standard output to a log file. The second runs and pipes its standard output to the tee command, which copies its standard input into its standard output. I have been instructed to use the latter, but dont want to do it blindly without understanding why. Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Erik Williams INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Kevin Lange INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Unix tee command
tee copies its standard input to its standard output AND the log_file. HTH David Lord -Original Message- Sent: 11 July 2001 15:12 To: Multiple recipients of list ORACLE-L I do not understand the difference between these two commands: script_file log_file script_file | tee log_file As I understand, the first runs and redirects its standard output to a log file. The second runs and pipes its standard output to the tee command, which copies its standard input into its standard output. I have been instructed to use the latter, but dont want to do it blindly without understanding why. Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Erik Williams INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Lord, David - CS INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Unix tee command
The tee command duplicates its input, sending one copy to the file, and the other to the screen (or the next command in the pipe). You get to see your data and save it too. Brian Norrell Manager, MPI Development QuadraMed 511 E John Carpenter Frwy, Su 500 Irving, TX 75062 (972) 831-6600 -Original Message- Sent: Wednesday, July 11, 2001 9:12 AM To: Multiple recipients of list ORACLE-L I do not understand the difference between these two commands: script_file log_file script_file | tee log_file As I understand, the first runs and redirects its standard output to a log file. The second runs and pipes its standard output to the tee command, which copies its standard input into its standard output. I have been instructed to use the latter, but dont want to do it blindly without understanding why. Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Erik Williams INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Norrell, Brian INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Unix tee command
Erik: This is from the HP-UX man page for tee: DESCRIPTION The tee command transcribes the standard input to the standard output and makes copies in the files. What this means in relative English is that the output is recorded to a file (as in script_file log_file) but you see it on the screen (as in script_file, which normally comes to STDOUT). We use this for automated process run by BMC's Enterprise Control System, where I want a log file on my machine, and the ECS wants a copy for it's sysout log. HTH, Mike --- === Michael P. Vergara | I've got a PBS mind in an MTV world Oracle DBA | Guidant Corporation | -Original Message- Sent: Wednesday, July 11, 2001 7:12 AM To: Multiple recipients of list ORACLE-L I do not understand the difference between these two commands: script_file log_file script_file | tee log_file As I understand, the first runs and redirects its standard output to a log file. The second runs and pipes its standard output to the tee command, which copies its standard input into its standard output. I have been instructed to use the latter, but dont want to do it blindly without understanding why. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Vergara, Michael (TEM) INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: OT: Unix tee command
The second one copies output to the log file. It still appears on your screen as well. Jared Erik Williams ewilliams@bro To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] wnco.comcc: Sent by: Subject: OT: Unix tee command [EMAIL PROTECTED] om 07/11/01 07:12 AM Please respond to ORACLE-L I do not understand the difference between these two commands: script_file log_file script_file | tee log_file As I understand, the first runs and redirects its standard output to a log file. The second runs and pipes its standard output to the tee command, which copies its standard input into its standard output. I have been instructed to use the latter, but dont want to do it blindly without understanding why. Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Erik Williams INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: OT: Unix tee command
tee copies it's standard input both to standard output and the file. You can see what it does and have a log file after that. BTW man tee is faster than putting this onto the list oli [EMAIL PROTECTED] wrote: I do not understand the difference between these two commands: script_file log_file script_file | tee log_file As I understand, the first runs and redirects its standard output to a log file. The second runs and pipes its standard output to the tee command, which copies its standard input into its standard output. I have been instructed to use the latter, but dont want to do it blindly without understanding why. Thanks Erik -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Erik Williams INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Oliver Artelt Oracle Certified DBA cubeoffice GmbH Co.KG # jordanstrasse 7 # 39112 magdeburg telefon: +49 (0)391 6 11 28 10 # telefax: +49 (0)391 6 11 28 19 email: [EMAIL PROTECTED] # web: http://www.cubeoffice.de -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Oliver Artelt INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
