Slow copy (cp) performance when overwriting files Post: 302831995

9 More Discussions You Might Find Interesting

1. Post Here to Contact Site Administrators and Moderators

Help! Slow Performance

Is the performance now very, very slow (pages take a very long time to load)? Or is it just me? Neo

2. Shell Programming and Scripting

egrep is very slow : How to improve performance

We have an egrep search in a while loop. egrep -w "$key" ${PICKUP_DIR}/new_update >> ${PICKUP_DIR}/update_record_new ${PICKUP_DIR}/new_update is 210 MB file In each iteration, the egrep on an average takes around 50-60 seconds to search. Ther'es nothing significant in the loop other...

3. Filesystems, Disks and Memory

Slow Copy(CP) performance

Hi all We have got issues with copying a 2.6 GB file from one folder to another folder. Well, this is not the first issue we are having on the box currently, i will try to explain everything we have done from the past 2 days. We got a message 2 days back saying that our Production is 98%...

4. UNIX for Dummies Questions & Answers

Slow copy/performance... between volumes

hi guys We are seeing weird issues on my Linux Suse 10, it has lotus 8.5 and 1 filesystem for OS and another for Lotus Database. the issue is when the Lotus service starts wait on top is very high about 25% percent and in general CPU usage is very high we found that when this happens if we...

5. Shell Programming and Scripting

copy files using scp without overwriting

Hi, i need to use "scp" to copy a file without overwriting the same in destinations. any suggestion? thanks Sivaji

6. Shell Programming and Scripting

Slow performance filtering file

Please, I need help tuning my script. It works but it's too slow. The code reads an acivity log file with 50.000 - 100.000 lines and filters error messages from it. The data in the actlog file look similar to this: 02/08/2011 00:25:01,ANR2034E QUERY MOUNT: No match found using this criteria....

7. Shell Programming and Scripting

Copy files from multiple directories into one directory without overwriting them

I have several directories and all those directories have .dat files in them. I want to copy all those .dat files to one directory say "collected_directory" The problem is I don't want to overwrite files. So, if two file names match, I don't want the old file to be overwritten with a new one. ...

8. Infrastructure Monitoring

99% performance wa, slow server.

There is a big problem with the server (VPS based on OpenVZ, CentOS 5, 3GB RAM). The problem is the following. The first 15-20 minutes after starting the server is operating normally, the load average is less than or about 1.0, but then begins to increase sharply% wa, then hovers around 95-99%....

9. Solaris

Solaris 11.1 Slow Network Performance

I have identical M5000 machines that are needing to transfer very large amounts of data between them. These are fully loaded machines, and I've already checked IO, memory usage, etc... I get poor network performance even when the machines are idle or copying via loopback. The 10 GB NICs are...

LEARN ABOUT HPUX

fsvoladm

fsvoladm(1M)															      fsvoladm(1M)

NAME

       fsvoladm - VxFS volume administration utility

SYNOPSIS

       [bias]

DESCRIPTION

       The  utility  performs administrative tasks, such as adding, removing, resizing, and encapsulating volumes in a specified VERITAS File Sys-
       tem.  mount_point specifies the directory on which the file system is mounted.

       volname specifies the volume within the volume set.

       By default, size, bias, and newsize are specified in units of disk blocks bytes).  However, you can append or to  the  number  to  indicate
       that the value is in kilobytes, megabytes, gigabytes, or terabytes, respectively.

   Keywords
       Adds a volume to a file system.	The new space is available for allocation.

       Removes an encapsulated volume from a file system
	      and restores the original contents of the volume.  This operation can fail if there were significant changes to a file's allocations
	      on disk since encapsulation.  A volume encapsulated with a bias cannot be deencapsulated.

       Adds a volume to a file system,
	      making the contents of that volume, starting from offset bias, available as a file instead of free space.

	      The size of the encapsulated file is size - bias.  bias must be smaller than size, and be a multiple of the file system block size.

	      The default value of bias is 0.

       Displays the volumes in a file system.

       Removes a volume from a file system.

       Resizes one of the volumes in a file system.
	      In some circumstances, the command cannot resize a 100% full file system due to lack of space for updating structural information.

	      Check VxFS file systems on a regular basis; increase their size if they approach 100% capacity.  This problem can also occur if  the
	      file system is very busy.  Free up space or reduce activity on the file system and try the resize again.

EXAMPLES

       The following command adds the volume that is 10 gigabytes in size, to the file system

       The following command removes the volume from the file system

       The following command resizes the volume in the file system from its current size to 20 GB:

       The following command displays the volumes in the file system

       The following command encapsulates the volume The volume is ten gigabytes in size, resides in the file system and has the file name

       The following command de-encapsulates the volume that was encapsulated in the previous example:

SEE ALSO

       df_vxfs(1M), fsapadm(1M), fsvoladm(1M), mount_vxfs(1M), vxvset(1M),

																      fsvoladm(1M)