[Search for users]
[Overall Top Noters]
[List of all Conferences]
[Download this site]
| Title: | Alpha Developer Support |
| Notice: | [email protected], 800-332-4786 |
| Moderator: | HYDRA::SYSTEM |
|
| Created: | Mon Jun 06 1994 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 3722 |
| Total number of notes: | 11359 |
3398.0. "Multipath Corporation" by HYDRA::LNARAYAN () Tue Mar 25 1997 19:41
Company Name : Multipath Corporation
Contact Name : Ron Young
Phone : (702) 831-4400
Fax : (702) 831-4401
Email : [email protected]
Date/Time in : 25-MAR-1997 19:41:24
Entered by : L. Narayan
SPE center : MRO
Category : UNIX
OS Version :
System H/W : Alpha
Brief Description of Problem:
-----------------------------
From: SMTP%"[email protected]" 25-MAR-1997 13:26:40.95
To: <[email protected]>
CC: "Dwight Manley" <[email protected]>
Subj: Direct I/O
Return-Path: [email protected]
Received: by asimov.mro.dec.com (UCX V4.1-12, OpenVMS V6.2 VAX);
Tue, 25 Mar 1997 13:26:38 -0500
Received: from pobox1.pa.dec.com by fluid.mro.dec.com (5.65v4.0/1.1.8.2/19Nov96-0448PM)
id AA08041; Tue, 25 Mar 1997 13:26:53 -0500
Received: by pobox1.pa.dec.com; id AA19079; Tue, 25 Mar 97 10:26:52 -0800
Received: from genoa.tol.net by mail2.digital.com (5.65 EXP 4/12/95 for V3.2/1.0/WV)
id AA14628; Tue, 25 Mar 1997 10:22:16 -0800
Received: from xl5100dp (toyabe-d72.sierra.net) by genoa.tol.net with SMTP id AA14303
(5.67b8/IDA-1.5 for <[email protected]>); Tue, 25 Mar 1997 10:25:39 -0800
Message-Id: <[email protected]>
X-Sender: [email protected]
X-Mailer: Windows Eudora Pro Version 3.0 (32)
Date: Tue, 25 Mar 1997 10:24:48 -0800
To: <[email protected]>
From: Ron Young <[email protected]>
Subject: Direct I/O
Cc: "Dwight Manley" <[email protected]>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
SGI has an option for direct I/O (not through the buffer cache) which we
have observed to provide a SIGNIFICANT performance benefit. To use direct
I/O on SGI systems, the file is opened with the O_DIRECT flag. Transfers
must be between 4Kb and 4Mb and must start on a 512 byte memory boundary.
Is there anything similar under DEC UNIX?
Do any of the open flags O_SYNC or O_DSYNC perform direct I/O.
Thanks, Ron Young
+---------------------------------+----------------------------------+
| Ron Young | Phone: (702) 831-4400 |
| Multipath Corporation | FAX: (702) 831-4401 |
| P.O. Box 8210 | E-mail: [email protected] |
| Incline Village, NV 89452-8210 | See Multipath's home page at |
| U.S.A. | http://www.fmslib.com |
+---------------------------------+----------------------------------+
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 3398.1 | closed | HYDRA::LNARAYAN | | Mon Apr 14 1997 14:05 | 3 |
| This feature is going to be avaliable in the Steel version of
Digital UNIX.
|