C-FFS anyone?
Hello! I've just read (well, partially) a whitepaper named "Embedded Inodes and Explicit Grouping: Exploiting Disk Bandwidth for Small Files" (don't have URL at hand). Ideas presented there are QUIT interesting. Did anyone tried to implement them in BSD? Alex. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Strange behaviour of loaded system
Hello! I've observed a VERY strange behaviour of a moderately-to-heavy loaded system (load average about 5.7 on a 2xPII-400 with 512Mb of RAM): (I have no access to the box right now, and I'm giving only general details; however, I'll be able to produce more details next morning) About 200-300 processes (230-280, something always creates and dies), some swapping (I recall 36% right now), and the most strange thing: always some (4-14M) of free RAM, and about 100 pageins per second. Most of processes are modperl'ed Apaches and self-written POP3 readers. I have no good understanding of such behaviour. Unfortunately I cannot find my "UNIX Internals: The New Frontier" for several days, so I'm really limited on books. Maybe some kind soul will tell me how can system behave that way? Alex. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Problems with FIFO open in non-blocking mode?
Hello!
The following program
#include stdio.h
#include fcntl.h
main() {
int control;
if ((control = open("STATUS",O_WRONLY|O_NONBLOCK))0) {
perror("Could not open STATUS ");
exit(1);
}
printf("STATUS ready\n");
close(control);
return(0);
}
fails to run (STATUS is pre-created FIFO file) with error "Device not
configured", which seems kinda odd for me.
However, when FIFO is opened with O_RDWR and O_NONBLOCK, every attempt
to select(2) its handler for writing doesn't wait until someone opens
FIFO for reading, but instead FIFO is ready to write at every select.
Is it a bug or a feature?
--
Alexander B. Povolotsky[ICQ 18277558]
[2:5020/145] [http://freebsd.svib.ru] [[EMAIL PROTECTED]]
To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-hackers" in the body of the message
Re: kern/13593: Problems with FIFO and select
"Bruce" == Bruce Evans writes: Description: Attempt to open FIFO file with O_WRONLY|O_NONBLOCK results in Device not configured error. Bruce This is because there is no reader when the FIFO is opened for Bruce writing (O_WRONLY opens of FIFOs normally block waiting for a Bruce reader, but O_NONBLOCK gives an error instead). Well, but how do I multiplex on FIFO opening? However, when FIFO is opened with O_RDWR and O_NONBLOCK, every attempt to select(2) its handler for writing doesn't wait until someone opens FIFO for reading, but instead FIFO is ready to write at every select. Bruce This is because O_RDWR gives both a reader and a writer. Well again, both things are reasonable, but I wanted to do the following: (1) open a control FIFO, for external commands (2) open a status FIFO, for status reporting (3) open several sockets for internal usage and than select() on all of them, waiting for either command to arrive, request for status, or (some internal event, select()-multiplexable). I can implement this using UNIX sockets and external programs, but can I make status reporting without external program? -- Alexander B. Povolotsky[ICQ 18277558] [2:5020/145] [http://freebsd.svib.ru] [[EMAIL PROTECTED]] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: kern/13593: Problems with FIFO and select
Bruce == Bruce Evans writes: Description: Attempt to open FIFO file with O_WRONLY|O_NONBLOCK results in Device not configured error. Bruce This is because there is no reader when the FIFO is opened for Bruce writing (O_WRONLY opens of FIFOs normally block waiting for a Bruce reader, but O_NONBLOCK gives an error instead). Well, but how do I multiplex on FIFO opening? However, when FIFO is opened with O_RDWR and O_NONBLOCK, every attempt to select(2) its handler for writing doesn't wait until someone opens FIFO for reading, but instead FIFO is ready to write at every select. Bruce This is because O_RDWR gives both a reader and a writer. Well again, both things are reasonable, but I wanted to do the following: (1) open a control FIFO, for external commands (2) open a status FIFO, for status reporting (3) open several sockets for internal usage and than select() on all of them, waiting for either command to arrive, request for status, or (some internal event, select()-multiplexable). I can implement this using UNIX sockets and external programs, but can I make status reporting without external program? -- Alexander B. Povolotsky[ICQ 18277558] [2:5020/145] [http://freebsd.svib.ru] [tark...@asteroid.svib.ru] To Unsubscribe: send mail to majord...@freebsd.org with unsubscribe freebsd-hackers in the body of the message
Problems with FIFO open in non-blocking mode?
Hello!
The following program
#include stdio.h
#include fcntl.h
main() {
int control;
if ((control = open(STATUS,O_WRONLY|O_NONBLOCK))0) {
perror(Could not open STATUS );
exit(1);
}
printf(STATUS ready\n);
close(control);
return(0);
}
fails to run (STATUS is pre-created FIFO file) with error Device not
configured, which seems kinda odd for me.
However, when FIFO is opened with O_RDWR and O_NONBLOCK, every attempt
to select(2) its handler for writing doesn't wait until someone opens
FIFO for reading, but instead FIFO is ready to write at every select.
Is it a bug or a feature?
--
Alexander B. Povolotsky[ICQ 18277558]
[2:5020/145] [http://freebsd.svib.ru] [tark...@asteroid.svib.ru]
To Unsubscribe: send mail to majord...@freebsd.org
with unsubscribe freebsd-hackers in the body of the message
Solution for mail pseudo-users?
Hello! I'm going to implement a large mail-box, with several hundreds of mail-only users. They should never access anything besides their POP3 mailboxes and change password via (SSLed) web interface. So, I don't want to add all of them to /etc/passwd. I have a hack that requires to change libc to make getpwent access not only /etc/master.passwd, but also some mySQL database, but it is hard-to-rebuild and overall dirty hack. Do not ask me to RTFM on PAM, for PAM does not allow me to add users not mentioned in passwd. As far as I understand, LDAP is rather bulky and suited to X.500 integration, and that is not what I want. Any suggestions, anyone? Alex. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: Solution for mail pseudo-users?
[EMAIL PROTECTED]Sergey Babkin writes: Any suggestions, anyone? Modify the POP daemon to use your mySQL database in addition to getpwent ? That seems to be the easiest way that should not break anything else. And modify sendmail to throw off mail for nonexistent users? Alex. -- Alexander B. Povolotsky[ICQ 18277558] [2:5020/145] [http://freebsd.svib.ru] [[EMAIL PROTECTED]] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Solution for mail pseudo-users?
Hello! I'm going to implement a large mail-box, with several hundreds of mail-only users. They should never access anything besides their POP3 mailboxes and change password via (SSLed) web interface. So, I don't want to add all of them to /etc/passwd. I have a hack that requires to change libc to make getpwent access not only /etc/master.passwd, but also some mySQL database, but it is hard-to-rebuild and overall dirty hack. Do not ask me to RTFM on PAM, for PAM does not allow me to add users not mentioned in passwd. As far as I understand, LDAP is rather bulky and suited to X.500 integration, and that is not what I want. Any suggestions, anyone? Alex. To Unsubscribe: send mail to majord...@freebsd.org with unsubscribe freebsd-hackers in the body of the message
Re: Solution for mail pseudo-users?
37a30852.20e5a...@bellatlantic.netSergey Babkin writes: Any suggestions, anyone? Modify the POP daemon to use your mySQL database in addition to getpwent ? That seems to be the easiest way that should not break anything else. And modify sendmail to throw off mail for nonexistent users? Alex. -- Alexander B. Povolotsky[ICQ 18277558] [2:5020/145] [http://freebsd.svib.ru] [tark...@asteroid.svib.ru] To Unsubscribe: send mail to majord...@freebsd.org with unsubscribe freebsd-hackers in the body of the message
Booting from vinum?
Hello! Is it possible to have a root partition on vinum'ed disk and benefit from mirroring? If yes, how do I do it? Alex. To Unsubscribe: send mail to majord...@freebsd.org with unsubscribe freebsd-hackers in the body of the message
