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Full Discussion: Cancelling Reorgvg
Operating Systems AIX Cancelling Reorgvg Post 302358047 by Stephan on Thursday 1st of October 2009 08:19:18 AM
Old 10-01-2009
Cancelling Reorgvg

hi guys.

Quick and simple question...

Can a reorgvg (aix 5.3) be canceled and what are them impacts if any? I would guess it can be canceled and once restarted, starts back where it left off?

Can't find the info in the man pages or google...

Thanks.
 

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AIO_CANCEL(3)						     Linux Programmer's Manual						     AIO_CANCEL(3)

NAME
aio_cancel - cancel an outstanding asynchronous I/O request SYNOPSIS
#include <aio.h> int aio_cancel(int fd, struct aiocb *aiocbp); Link with -lrt. DESCRIPTION
The aio_cancel() function attempts to cancel outstanding asynchronous I/O requests for the file descriptor fd. If aiocbp is NULL, all such requests are canceled. Otherwise, only the request described by the control block pointed to by aiocbp is canceled. (See aio(7) for a description of the aiocb structure.) Normal asynchronous notification occurs for canceled requests (see aio(7) and sigevent(7)). The request return status (aio_return(3)) is set to -1, and the request error status (aio_error(3)) is set to ECANCELED. The control block of requests that cannot be canceled is not changed. If the request could not be canceled, then it will terminate in the usual way after performing the I/O operation. (In this case, aio_error(3) will return the status EINPROGRESSS.) If aiocbp is not NULL, and fd differs from the file descriptor with which the asynchronous operation was initiated, unspecified results occur. Which operations are cancelable is implementation-defined. RETURN VALUE
The aio_cancel() function returns one of the following values: AIO_CANCELED All requests were successfully canceled. AIO_NOTCANCELED At least one of the requests specified was not canceled because it was in progress. In this case, one may check the status of indi- vidual requests using aio_error(3). AIO_ALLDONE All requests had already been completed before the call. -1 An error occurred. The cause of the error can be found by inspecting errno. ERRORS
EBADF fd is not a valid file descriptor. ENOSYS aio_cancel() is not implemented. VERSIONS
The aio_cancel() function is available since glibc 2.1. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +-------------+---------------+---------+ |Interface | Attribute | Value | +-------------+---------------+---------+ |aio_cancel() | Thread safety | MT-Safe | +-------------+---------------+---------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008. EXAMPLE
See aio(7). SEE ALSO
aio_error(3), aio_fsync(3), aio_read(3), aio_return(3), aio_suspend(3), aio_write(3), lio_listio(3), aio(7) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2015-03-02 AIO_CANCEL(3)
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