topic vx_maxlink kernel param? in Operating System - HP-UX

vx_maxlink kernel param?

Michael Bouwma_2 — Fri, 29 Aug 2003 17:30:17 GMT

What is this and what should this be possibly be set at?

Re: vx_maxlink kernel param?

Helen French — Fri, 29 Aug 2003 17:35:31 GMT

vx_maxlink: It's a JFS tunable parameter which is the number of subdirectories created with in a directory. The default value is 32767.

Re: vx_maxlink kernel param?

Denver Osborn — Fri, 29 Aug 2003 17:37:36 GMT

and don't set it higher than 65535. Also see the patch text from patch PHKL_21210 for details on vx_maxlink.

-denver

Re: vx_maxlink kernel param?

Patrick Wallek — Fri, 29 Aug 2003 17:41:14 GMT

From the PHKL_28117 information:

The maximum reference count of a directory is limited to LINK_MAX, currently defined as 32767. Hence it is not possible to create more than 32767 subdirectories.

Resolution:
A new tunable vx_maxlink has been added which will allow to increase the maximum number of subdirectories of a directory from 32767 to 65534. When the tunable is set to a value greater than 65534, the operating system will reset it to 65534. Note that some older applications which are using the st_nlink field of the stat structure as type "short" instead of "unsigned short" may see negative values on the link count of directories when tuning vx_maxlink above 32767.

Re: vx_maxlink kernel param?

Michael Bouwma_2 — Fri, 29 Aug 2003 17:46:09 GMT

Thank you to all for the fast response