Veritas™ File System 5.0.1 Programmer's Reference Guide

Index maintenance application

This sample application is for a system that maintains an index of all files in the

file system to enable a fast search similar to the locate program in Linux. The

system needs to update the index periodically, or as required with respect to the

file changes since the last index update. The following lists the basic steps to

perform and shows a sample call to the FCL API.

To prepare the application

Enable the FCL.

$ fcladm on mntpt

Tune fcl_keeptime and fcl_maxalloc to the required values.

$ vxtunefs —o fcl_keeptime=value

$ vxtunefs —o fcl_maxalloc=value

To test the application

Open the FCL file.

$ vxfs_fcl_open(mntpt, 0, &fh);

Seek to the end.

$ vxfs_fcl_seek(fh, NULL, FCL_SEEK_END);

Get the cookie and store it in a file.

$ vxfs_fcl_getcookie(fh, &cookie)

write(fd, cookie, sizeof(struct fcl_cookie));

Create the index.

To update the application

Open the FCL file.

$ vxfs_fcl_open(mntpt, 0, &fh);

Read the cookie and seek to the cookie.

$ read(fd, &cookie, sizeof(struct fcl_cookie))

$ vxfs_fcl_seek(fh, cookie, FCL_SEEK_COOKIE)

File Change Log

Application programming interface for File Change Log