12-24-2015
Solaris 10 - Filesystem become read only suddenly
Hi,
i just started few days ago to face the problem when the whole system is getting freeze. By freeze i mean:
* server is reachable (via network)
* i cannot connect to server via SSH or Telnet(when try to use SSH or telnet it will find server, try to connect, but it freeze after successfull enter the username and password - using root account)
* i can connect sometimes to the system via the WINSCP i can browse the filesystem but i can`t change any files - when i try it ,the WINSCP get freeze and i have to close it forcely
* the only way how to get the system working is only to restart it directly by pressing the poweron/off button on the server, then the server boot up and is working normally
Iam not the experienced admin, maybe better to say user who has server and use it mainly for web app and programming, so i do not know where to start to find out where is the problem. What i did is:
* i checked the harddisk for errors - nothing (using iostat)
* i checked the /var/adm/messages for some errors but nothing i found (let say, no errors, only notices
* what seems to me is that the system suddenly become readonly, but why i do not know.
Is there somebody who:
* maybe experienced the same problem and/or know where could be the problem?
*can help me to lead what, where and how should i check if there is HW/OS problem?
*can give me some good advice what to do?
Thank you for your help.
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LEARN ABOUT DEBIAN
coro::storable
Storable(3pm) User Contributed Perl Documentation Storable(3pm)
NAME
Coro::Storable - offer a more fine-grained Storable interface
SYNOPSIS
use Coro::Storable;
DESCRIPTION
This module implements a few functions from the Storable module in a way so that it cede's more often. Some applications (such as the
Deliantra game server) sometimes need to load large Storable objects without blocking the server for a long time.
This is being implemented by using a perlio layer that feeds only small amounts of data (4096 bytes per call) into Storable, and
"Coro::cede"'ing regularly (at most 100 times per second by default, though).
As Storable is not reentrant, this module also wraps most functions of the Storable module so that only one freeze or thaw is done at any
one moment (and recursive invocations are not currently supported).
FUNCTIONS
$ref = thaw $pst
Retrieve an object from the given $pst, which must have been created with "Coro::Storable::freeze" or
"Storable::store_fd"/"Storable::store" (sorry, but Storable uses incompatible formats for disk/mem objects).
This function will cede regularly.
$pst = freeze $ref
Freeze the given scalar into a Storable object. It uses the same format as "Storable::store_fd".
This functino will cede regularly.
$pst = nfreeze $ref
Same as "freeze" but is compatible to "Storable::nstore_fd" (note the "n").
$pst = blocking_freeze $ref
Same as "freeze" but is guaranteed to block. This is useful e.g. in "Coro::Util::fork_eval" when you want to serialise a data structure
for use with the "thaw" function for this module. You cannot use "Storable::freeze" for this as Storable uses incompatible formats for
memory and file images, and this module uses file images.
$pst = blocking_nfreeze $ref
Same as "blocking_freeze" but uses "nfreeze" internally.
$guard = guard
Acquire the Storable lock, for when you want to call Storable yourself.
Note that this module already wraps all Storable functions, so there is rarely the need to do this yourself.
AUTHOR
Marc Lehmann <schmorp@schmorp.de>
http://home.schmorp.de/
perl v5.14.2 2012-04-13 Storable(3pm)