Re: ZFS Striping and Optimizing Capabilities
In the last episode (Apr 09), Chris Telting said: Just a few questions about what ZFS actually does. So if anyone has intimate knowledge about ZFS's implementation on Freebsd I'm sure I and others would appreciate the answers. When you add a second and or thrid drive/partition to a zpool I'm assuming that it's going to start using the drives like a raid 0 stripe. How do the ZFS versions differ in this? Does it immediately start striping all files in the background on low priority or does it do it as files are accessed? Does ZFS in any way do performance testing of Currently ZFS never moves a block once it has been written. The whole implementation of copy-on-write and snapshots relies on this. If you add a new zvol to a pool, new data will get balanced across all the zvols but old data will stay where it was. Ideally you should expand pools before they get too full, or zpool export/import them into new pools if you want good distribution over all disks. There have been hints for the last few years of a bp rewite feature appearing, but it has never materialized. -- Dan Nelson dnel...@allantgroup.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Problem with an ATI x2900 video adapter
On Sun, 10 Apr 2011, Michael D. Norwick wrote: surprised this afternoon when, while the installation of gnome2 was working, I think it was building GCC 4.4 and friends, the HP 2010i LCD monitor I use on the machine appeared to lose the input to its DVI port. The HD activity light was still flickering so I let it continue and waited a hour or so for it to quit indicating activity before I pressed the reset button. Sounds like the video card went into power save. Pressing a shift key might have brought it back. I would like to know if anyone else has experienced this or, if a PR is necessary against the Xorg radeon driver. It's not clear whether you were running in the console or X. If X wasn't even installed yet, the radeon driver could not have been at fault. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: malloc: errno: 22: Invalid argument
On Sat, 9 Apr 2011 17:17:06 +0200, Sami Kerola kerol...@iki.fi wrote:
On Sat, Apr 9, 2011 at 16:43, John Levine jo...@iecc.com wrote:
Your code is wrong. There's only a useful value in errno after
something fails. This would be more reasonable:
int main(void)
{
int *i;
/* warn(errno: %d, errno); -- no error, nothing to check */
i = malloc(sizeof(int));
if(!i)warn(errno: %d, errno); /* only warn on failure */
free(i); /* -- free ignores NULL argument */
return (0); /* -- free cannot fail, no meaningful errno */
}
This isn't specific to FreeBSD, by the way. It's ANSI C.
Different systems seem to work different ways. Indeed you are right,
the behavior of operating system setting errno when malloc is
successful is allowed.
http://pubs.opengroup.org/onlinepubs/009695399/functions/errno.html
http://pubs.opengroup.org/onlinepubs/009695399/functions/malloc.html
Perhaps it was just a naive beginner expectation that errno is not set
by functions when they are successful. I'll remove the check from the
end of the program since there is no guarantees it would mean anything
sensible.
Allow me an addition:
For meaningful main() return values, use EXIT_SUCCESS or
EXIT_FAILURE (as defined in stdlib.h) instead of the errno
set by a function. This is the always portable test for
zero, as in everything okay - zero; error - not zero,
usually 1, but primarily NOT ZERO. :-)
FreeBSD allows more detailed return values like EX_CONFIG,
EX_USGE or EX_SOFTWARE (as defined in sysexits.h), but I'm
not sure if this is fully portable across all BSDs, UNIX,
and the various Linusi.
--
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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Re: Problem with an ATI x2900 video adapter
On 04/10/11 06:44, Warren Block wrote: On Sun, 10 Apr 2011, Michael D. Norwick wrote: surprised this afternoon when, while the installation of gnome2 was working, I think it was building GCC 4.4 and friends, the HP 2010i LCD monitor I use on the machine appeared to lose the input to its DVI port. The HD activity light was still flickering so I let it continue and waited a hour or so for it to quit indicating activity before I pressed the reset button. Sounds like the video card went into power save. Pressing a shift key might have brought it back. I would like to know if anyone else has experienced this or, if a PR is necessary against the Xorg radeon driver. It's not clear whether you were running in the console or X. If X wasn't even installed yet, the radeon driver could not have been at fault. Yes, Xorg was running with gdm and gnome2. I was building packages from ports in a gterm. No, no combination of Shift-Fn or Meta-key-Fn did anything. The keyboard was active as the Caps-Lock and Num-Lock lights worked. The monitor power save features are disabled. I wonder if the Linux Catalyst Control Center app. from ATI would work under VirtualBox-OSE? Thank You, Michael ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
expr problem
Hi Dino, It looks to me like you don't want to FreeBSD's expr (pretty much like me). You probably want to install the GNU version, which I think is available in the coreutils port. Let me know if this helps. Regards Manish Jain ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: ZFS Striping and Optimizing Capabilities
--As of April 9, 2011 9:27:41 PM -0700, Chris Telting is alleged to have said: Does ZFS in any way do performance testing of read/right operating in light of where the data is stored on the drive? i.e. the outside sectors of hard drives perform faster. If it does do read/write location testing can it be shut off or does it detect SSDs? What about tracing application sector reading and reordering sectors so that they follow one another according to typical usage? i.e. the sectors are already in the linear read ahead buffer? --As for the rest, it is mine. I'll let you see Dan Nelson's answer for the striping questions. While I have no inside knowledge of the performance testing handling of ZFS, it doesn't appear to do anything too automagically in that arena. You give it a drive, it will use it, like any other file system. It can give you stats on I/O for each drive as well as the pool in general, and it appears to try to balance reads/writes across all the drives, but that's implied in mirroring or RAID setups. (And remember: ZFS can do either one. You can't add to a RAID volume though, like you can to a mirrored volume.) It does try to cache files, in a fairly aggressive fashion. (By the docs, ZFS will try to fill *all unused RAM* with cached files by default.) And while it doesn't appear to have anything that auto-detects faster drives, you can specify a drive for caching or for the write log. (Caching speeds up reads, and deduplication in versions that support that. The write log speeds up writes.) Telling it to use a SSD for that will speed up those operations considerably. (Note that while a cache drive is considered expendable, the write-log drive is not, and it's recommended that you set up a mirror for it.) Daniel T. Staal --- This email copyright the author. Unless otherwise noted, you are expressly allowed to retransmit, quote, or otherwise use the contents for non-commercial purposes. This copyright will expire 5 years after the author's death, or in 30 years, whichever is longer, unless such a period is in excess of local copyright law. --- ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Problem with an ATI x2900 video adapter
On Sun, 10 Apr 2011, Michael D. Norwick wrote: On 04/10/11 06:44, Warren Block wrote: Sounds like the video card went into power save. Pressing a shift key might have brought it back. I would like to know if anyone else has experienced this or, if a PR is necessary against the Xorg radeon driver. It's not clear whether you were running in the console or X. If X wasn't even installed yet, the radeon driver could not have been at fault. Yes, Xorg was running with gdm and gnome2. I was building packages from ports in a gterm. No, no combination of Shift-Fn or Meta-key-Fn did anything. The keyboard was active as the Caps-Lock and Num-Lock lights worked. The monitor power save features are disabled. Maybe xscreensaver? Whatever's causing it, it's not a common problem. I wonder if the Linux Catalyst Control Center app. from ATI would work under VirtualBox-OSE? No, the hardware is virtualized to the VM. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
ANNOUNCING: FreeBSD 8.2-RELEASE Custom XFCE builds (32/64bits) released
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hey all, I have just completed an 8.2-RELEASE based build of the 'Custom releases' project hosted here: http://freebsd-custom.wikidot.com Both 32 and 64 bits are available for download: http://freebsd-custom.wikidot.com/downloads-page This release is based on the latest XFCE (4.8) desktop and includes a wide variety of desktop-related packages, like LibreOffice, abiword, gnumeric, firefox 4, gimp, inkscape, evince and so on. The base system is 8.2-RELEASE. A few other small window managers are included like windowmaker, fluxbox and icewm. The slim login manager is also included for people wishing to have a graphical logon screen. Make sure to read the README file before installation. This is available on the downloads page as well as on the root directory of the DVD. Also note that installing linux related packages during initial setup needs a few more steps. This is due to differences in sysinstall between 7.X and 8.X releases. A detailed explanation is provided in the README file. As always, please report any problems, success stories, comments and criticisms to mano...@freebsd.org -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk2h2xIACgkQZ/MxGm4PtJQrBACdE9dEJfzgrEtu3iso6sVR48et ZYkAn1najLMrBljw/SOr5pU1pCy0Awus =gDeA -END PGP SIGNATURE- ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
I'm looking for a curses one-iner.
People, Can anybody point me to a one-line of curses (it may be *long* and obscure) that allows keyboard input _without_ hitting cr/enter. So, in effect, I couold use the curses getchar() and have things echoed to stdout without bothering to type Enter. There may be a matching one-liner to set things back to the way they were upon exiting the curses program. tia, gary -- Gary Kline kl...@thought.org http://www.thought.org Public Service Unix Journey Toward the Dawn, E-Book: http://www.thought.org The 7.98a release of Jottings: http://jottings.thought.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: I'm looking for a curses one-iner.
Quoth Gary Kline on Sunday, 10 April 2011: People, Can anybody point me to a one-line of curses (it may be *long* and obscure) that allows keyboard input _without_ hitting cr/enter. So, in effect, I couold use the curses getchar() and have things echoed to stdout without bothering to type Enter. There may be a matching one-liner to set things back to the way they were upon exiting the curses program. http://tldp.org/HOWTO/NCURSES-Programming-HOWTO/init.html#RAWCBREAK See also man raw. I think what you want is raw() and noraw(). -- .o. | Sterling (Chip) Camden | http://camdensoftware.com ..o | sterl...@camdensoftware.com | http://chipsquips.com ooo | 2048R/D6DBAF91 | http://chipstips.com pgpqUwnvTYXfc.pgp Description: PGP signature
Re: I'm looking for a curses one-iner.
On Sun, Apr 10, 2011 at 12:22:50PM -0700, Chip Camden wrote: Quoth Gary Kline on Sunday, 10 April 2011: People, Can anybody point me to a one-line of curses (it may be *long* and obscure) that allows keyboard input _without_ hitting cr/enter. So, in effect, I couold use the curses getchar() and have things echoed to stdout without bothering to type Enter. There may be a matching one-liner to set things back to the way they were upon exiting the curses program. http://tldp.org/HOWTO/NCURSES-Programming-HOWTO/init.html#RAWCBREAK See also man raw. I think what you want is raw() and noraw(). YES! ANd give that man in the srtaw hat a seegar! After waiting and thinking about howto get a user-side driver to make individual keys click, and after wading thru the 30 pages of python that i'm now getting my head around, I decided to try it myself. Borrow here/there, and put in my own click.c into the daemon. According to the one-laptop-per-child group my program might be a win for their platform. The keyboard is membrane-style. Et cetera. Even if it only help me on my old 2005 Thinkpad, hey -- .o. | Sterling (Chip) Camden | http://camdensoftware.com ..o | sterl...@camdensoftware.com | http://chipsquips.com ooo | 2048R/D6DBAF91 | http://chipstips.com -- Gary Kline kl...@thought.org http://www.thought.org Public Service Unix Journey Toward the Dawn, E-Book: http://www.thought.org The 7.98a release of Jottings: http://jottings.thought.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
full disk encryption with geli - where does the stuff in /boot/kernel
I am attempting to set up full disk encryption with GELI, booting from an unencrypted thumb drive, using the following PDF by Marc Schiesser as a guide: http://events.ccc.de/congress/2005/fahrplan/attachments/586-paper_Complete_Hard_Disk_Encryption.pdf In section 3.5.5, The removable medium, it says to copy everything from the fixed disk's boot directory to the thumb drive, and then zip up various things from the removable disk's boot/kernel directory (the fixed disk is mounted as /fixed and the removable as /removable): # cp -Rpv /fixed/boot /removable # cd /removable/boot/kernel # gzip kernel geom_eli.ko acpi.ko My issue is that there is nothing in /removable/boot/kernel. Obviously whatever would be there would have come from the cp -Rpv /fixed/boot /removable line, so I checked in /fixed/boot/kernel, and there's nothing there either. Presumably whatever would be in /fixed/boot/kernel would have been placed there in the previous step, section 3.5.4, which includes: # mount /dev/ad0.elia /fixed # export DESTDIR=/fixed/ # cd /dist/6.0-RELEASE/base ./install.sh That did create a bunch of stuff on /fixed, including /fixed/boot and even /fixed/boot/kernel, but it did not place any files in /fixed/boot/kernel. One difference that I should mention at this point is that I'm using 8.2, not 6.0, so I actually did a cd /dist/8.2-RELEASE/base instead of the cd /dist/6.0-RELEASE/base that the document suggests. Other than that, I think I did everything the same as it suggests. Is there a step missing in the document? Or did I screw something up? In any case, can I just copy the necessary files to /removable/boot/kernel from /dist/boot/kernel instead of from /fixed/boot/kernel? Or do I have to get them in some other way? And what files are needed? Obviously kernel, geom_eli.ko, and acpi.ko, and I believe that geom_eli.ko requires both zlib.ko and crypto.ko, but do I have to get any other files, too? Thanks in advance for any help. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: full disk encryption with geli - where does the stuff in /boot/kernel
Oh, one other difference between what I've done and what the document says to do: I don't actually have a /dev/ad0. I have ad4, ad5, and ad6. Wherever the document says /dev/ad0, I've been using /dev/ad4 instead. I'm guessing that this is not important to the problem I'm facing, but I figured I should mention in just in case my guess is wrong. From: Gil Mordron gilmord...@yahoo.com To: freebsd-questions@freebsd.org Sent: Sun, April 10, 2011 10:34:42 PM Subject: full disk encryption with geli - where does the stuff in /boot/kernel I am attempting to set up full disk encryption with GELI, booting from an unencrypted thumb drive, using the following PDF by Marc Schiesser as a guide: http://events.ccc.de/congress/2005/fahrplan/attachments/586-paper_Complete_Hard_Disk_Encryption.pdf In section 3.5.5, The removable medium, it says to copy everything from the fixed disk's boot directory to the thumb drive, and then zip up various things from the removable disk's boot/kernel directory (the fixed disk is mounted as /fixed and the removable as /removable): # cp -Rpv /fixed/boot /removable # cd /removable/boot/kernel # gzip kernel geom_eli.ko acpi.ko My issue is that there is nothing in /removable/boot/kernel. Obviously whatever would be there would have come from the cp -Rpv /fixed/boot /removable line, so I checked in /fixed/boot/kernel, and there's nothing there either. Presumably whatever would be in /fixed/boot/kernel would have been placed there in the previous step, section 3.5.4, which includes: # mount /dev/ad0.elia /fixed # export DESTDIR=/fixed/ # cd /dist/6.0-RELEASE/base ./install.sh That did create a bunch of stuff on /fixed, including /fixed/boot and even /fixed/boot/kernel, but it did not place any files in /fixed/boot/kernel. One difference that I should mention at this point is that I'm using 8.2, not 6.0, so I actually did a cd /dist/8.2-RELEASE/base instead of the cd /dist/6.0-RELEASE/base that the document suggests. Other than that, I think I did everything the same as it suggests. Is there a step missing in the document? Or did I screw something up? In any case, can I just copy the necessary files to /removable/boot/kernel from /dist/boot/kernel instead of from /fixed/boot/kernel? Or do I have to get them in some other way? And what files are needed? Obviously kernel, geom_eli.ko, and acpi.ko, and I believe that geom_eli.ko requires both zlib.ko and crypto.ko, but do I have to get any other files, too? Thanks in advance for any help. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Options for Secondary DNS Service?
Hi, I am looking for a secondary DNS service. Any suggestion? It is not for a non-profit organisation so I am not necessarily looking for a free solution, but I am wondering if there are reliable solutions for less than what dyndns charges ($40 /year/zone). Thanks! ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Options for Secondary DNS Service?
whats the org ? could consider domating On Sun, Apr 10, 2011 at 11:43 PM, Pierre-Luc Drouin pldro...@pldrouin.netwrote: Hi, I am looking for a secondary DNS service. Any suggestion? It is not for a non-profit organisation so I am not necessarily looking for a free solution, but I am wondering if there are reliable solutions for less than what dyndns charges ($40 /year/zone). Thanks! ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
