Interrupt in a multi-cpu machine

Hi,
I want to know how the interrput is dealed in a multiprocessor environment. Anyone can tell me or point me to the doc. to check?
Will interrupt be sent to different CPU equally or they are given to one default CPU?
Thanks!
Yong

I've seen, however that most operating systems like processor affinity and
          won't go out of their way to spread threads across CPUs due to CPU cache
          synchronization expense. Running two WLS instances on a dual processor
          machine will give you more throughput.
          Mike Reiche <[email protected]> wrote in message
          news:3bcf1d58$[email protected]..
          >
          > You don't need two instances of WL to take advantage of two CPUs.
          >
          > Each WL instance in a cluster requires its own IP address. You can refer
          to them
          > by their IP address.
          >
          > Mike
          >
          >
          > "jyothi" <[email protected]> wrote:
          > >
          > >hi,
          > >if we need to plan a cluster on a multi-cpu machine..how does
          > >the installation of wls go..do we need to install two instances of WLS
          > >on the
          > >machine or do we have to install only one instance??
          > >
          > >also wrt wls6.0, through the admin console running on another machine..we
          > >create
          > >new entries for machine's first and then we create new servers .. how
          > >do we associate
          > >the two servers running on the same multi-cpu machine with the machine
          > >name??
          > >
          > >thanks
          > >jyothi
          >

Similar Messages

Performance problem - mutexes with multi-cpu machine

Hi!
My company is developing multi-threaded server program for
multi-cpu machine which communicates with Oracle database on separate
machine. We use Solaris 7, Workshop 5 CC and pthreads API.
We tested our program on 4 CPU E4500 with 2 CPU E420 Oracle server.
We upgraded E4500 from 4 to 8 CPU and to our surprise instead of
performance improvement we got performance degradation ( 8 CPU runs
about 5% slower than 4 CPU ).
After a long investigation we found out that under stress load most of the
time our performs lwpmutex related operation.
With truss -c statistics was 160 secs in mutex operations and
about 2 secs was read/write in oracle client side library.
Here is output of truss for example:
19989 29075/5: 374.0468 0.0080 lwp_mutex_lock(0x7F2F3F60 = 0
19990 29075/31: 374.0466 0.0006 lwp_mutex_wakeup(0x7F2F3F60) = 0
19991 29075/5: 374.0474 0.0006 lwp_mutex_wakeup(0x7F2F3F60) = 0
19992 29075/30: 374.0474 0.0071 lwp_mutex_lock(0x7F2F3F60) = 0
19993 29075/30: 374.0484 0.0010 lwp_mutex_wakeup(0x7F2F3F60) = 0
19994 29075/31: 374.0483 0.0017 lwp_mutex_lock(0x7F2F3F60) = 0
19995 29075/5: 374.0492 0.0018 lwp_mutex_lock(0x7F2F3F60) = 0
19996 29075/31: 374.0491 0.0008 lwp_mutex_wakeup(0x7F2F3F60) = 0
19997 29075/5: 374.0499 0.0007 lwp_mutex_wakeup(0x7F2F3F60) = 0
19998 29075/30: 374.0499 0.0015 lwp_mutex_lock(0x7F2F3F60) = 0
19999 29075/5: 374.0507 0.0008 lwp_mutex_lock(0x7F2F3F60) = 0
20000 29075/30: 374.0507 0.0008 lwp_mutex_wakeup(0x7F2F3F60) = 0
20001 29075/5: 374.0535 0.0028 lwp_mutex_wakeup(0x7F2F3F60) = 0
20002 29075/30: 374.0537 0.0030 lwp_mutex_wakeup(0x7F2F3F60) = 0
20003 29075/31: 374.0537 0.0046 lwp_mutex_lock(0x7F2F3F60) = 0
20004 29075/5: 374.0547 0.0012 lwp_mutex_lock(0x7F2F3F60) = 0
20005 29075/31: 374.0546 0.0009 lwp_mutex_wakeup(0x7F2F3F60) = 0
20006 29075/5: 374.0554 0.0007 lwp_mutex_wakeup(0x7F2F3F60) = 0
20007 29075/30: 374.0557 0.0020 lwp_mutex_lock(0x7F2F3F60) = 0
20008 29075/31: 374.0555 0.0009 lwp_mutex_wakeup(0x7F2F3F60) = 0
20009 29075/5: 374.0564 0.0010 lwp_mutex_lock(0x7F2F3F60) = 0
20010 29075/30: 374.0564 0.0007 lwp_mutex_wakeup(0x7F2F3F60) = 0
20011 29075/5: 374.0572 0.0008 lwp_mutex_wakeup(0x7F2F3F60) = 0
20012 29075/28: 374.0574 0.0170 lwp_mutex_lock(0x7F2F3F60) = 0
20013 29075/31: 374.0575 0.0020 lwp_mutex_wake(0x7F2F3F60) = 0
We have a several question:
1. We always get the same mutex address : 0x7F2F3F60 even with different
binaries. It looks that all threads wait on one and magic
mutex. Why?
2. We read in article on unixinsider.com that on Solaris when mutex is
unlocked all the threads waiting on this mutex are waked up. It also looks so
from truss output. What is solution for this problem? unixinsider.com
recommends native Solaris read-write lock with all threads as writers?
Is there any other solution? Should in improve performance?
3. We heard that Solaris 8 has better pthreads implementation using a
one-level threading model, where threads are one-to-one with
lwp, rather than the two-level model that is used in the
standard libthread implementation, where user-level threads are
multiplexed over possibly fewer lwps. Are mutexes in this library
behave in "Solaris 7" way or do it put thread to sleep when it unlocks
the mutex? Is it possible to use this library on Solaris 7?
4. Is there plug - in solution like mtmalloc or hoard for new/delete that change
pthread mutexes?
Thank you in advance for your help,
Alexander Indenbaum

<pre>
Hi!
My company is developing multi-threaded server program for
multi-cpu machine which communicates with Oracle database on separate
machine. We use Solaris 7, Workshop 5 CC and pthreads API.
We tested our program on 4 CPU E4500 with 2 CPU E420 Oracle server.
We upgraded E4500 from 4 to 8 CPU and to our surprise instead of
performance improvement we got performance degradation ( 8 CPU runs
about 5% slower than 4 CPU ).
After a long investigation we found out that under stress load most of the
time our performs lwpmutex related operation.
With truss -c statistics was 160 secs in mutex operations and
about 2 secs was read/write in oracle client side library.
Here is output of truss for example:
19989 29075/5: 374.0468 0.0080 lwp_mutex_lock(0x7F2F3F60) = 0
19990 29075/31: 374.0466 0.0006 lwp_mutex_wakeup(0x7F2F3F60) = 0
19991 29075/5: 374.0474 0.0006 lwp_mutex_wakeup(0x7F2F3F60) = 0
19992 29075/30: 374.0474 0.0071 lwp_mutex_lock(0x7F2F3F60) = 0
19993 29075/30: 374.0484 0.0010 lwp_mutex_wakeup(0x7F2F3F60) = 0
19994 29075/31: 374.0483 0.0017 lwp_mutex_lock(0x7F2F3F60) = 0
19995 29075/5: 374.0492 0.0018 lwp_mutex_lock(0x7F2F3F60) = 0
19996 29075/31: 374.0491 0.0008 lwp_mutex_wakeup(0x7F2F3F60) = 0
19997 29075/5: 374.0499 0.0007 lwp_mutex_wakeup(0x7F2F3F60) = 0
19998 29075/30: 374.0499 0.0015 lwp_mutex_lock(0x7F2F3F60) = 0
19999 29075/5: 374.0507 0.0008 lwp_mutex_lock(0x7F2F3F60) = 0
20000 29075/30: 374.0507 0.0008 lwp_mutex_wakeup(0x7F2F3F60) = 0
20001 29075/5: 374.0535 0.0028 lwp_mutex_wakeup(0x7F2F3F60) = 0
20002 29075/30: 374.0537 0.0030 lwp_mutex_wakeup(0x7F2F3F60) = 0
20003 29075/31: 374.0537 0.0046 lwp_mutex_lock(0x7F2F3F60) = 0
20004 29075/5: 374.0547 0.0012 lwp_mutex_lock(0x7F2F3F60) = 0
20005 29075/31: 374.0546 0.0009 lwp_mutex_wakeup(0x7F2F3F60) = 0
20006 29075/5: 374.0554 0.0007 lwp_mutex_wakeup(0x7F2F3F60) = 0
20007 29075/30: 374.0557 0.0020 lwp_mutex_lock(0x7F2F3F60) = 0
20008 29075/31: 374.0555 0.0009 lwp_mutex_wakeup(0x7F2F3F60) = 0
20009 29075/5: 374.0564 0.0010 lwp_mutex_lock(0x7F2F3F60) = 0
20010 29075/30: 374.0564 0.0007 lwp_mutex_wakeup(0x7F2F3F60) = 0
20011 29075/5: 374.0572 0.0008 lwp_mutex_wakeup(0x7F2F3F60) = 0
20012 29075/28: 374.0574 0.0170 lwp_mutex_lock(0x7F2F3F60) = 0
20013 29075/31: 374.0575 0.0020 lwp_mutex_wakeup(0x7F2F3F60) = 0
We have a several question:
1. We always get the same mutex address : 0x7F2F3F60 even with different
binaries. It looks that all threads wait on one and magic
mutex. Why?
2. We read in article on unixinsider.com that on Solaris when mutex is
unlocked all the threads waiting on this mutex are waked up. It also looks so
from truss output. What is solution for this problem? unixinsider.com
recommends native Solaris read-write lock with all threads as writers?
Is there any other solution? Should in improve performance?
3. We heard that Solaris 8 has better pthreads implementation using a
one-level threading model, where threads are one-to-one with
lwp, rather than the two-level model that is used in the
standard libthread implementation, where user-level threads are
multiplexed over possibly fewer lwps. Are mutexes in this library
behave in "Solaris 7" way or do it put thread to sleep when it unlocks
the mutex? Is it possible to use this library on Solaris 7?
4. Is there plug - in solution like mtmalloc or hoard for new/delete that change
pthread mutexes?
Thank you in advance for your help,
Alexander Indenbaum
</pre>

Creating database on multi cpu machines

Hello:
I want to issue the create database statements on a machine that has multiple cpu.
Would like to to know what are the parameters if any need to specify in the ora file and anything specific needs to be done in the create database statement and if there are other considerations.
Thanks,

You can utilize there parameters if you have multiple cpu servers.
parallel_max_servers integer 5
parallel_min_percent integer 0
parallel_min_servers integer 0
parallel_server boolean FALSE
parallel_server_instances integer 1
parallel_threads_per_cpu integer 2
Regards,
http://askyogesh.com

Limiting WLS to a single processor on a multi-CPU machine

How can I configure WLS to only use a single processor on a multiprocessor
machine? Will launching with green threads do the trick? Is there some way
to permit the use of native threads but to exclude a set of processors?
How do I do this under WLS318? WLS451?
Any help is much appreciated.
-Adam Galper

Adam Galper wrote:
How can I configure WLS to only use a single processor on a multiprocessor
machine?It's os-dependent, but most will allow you to bind a process to a single
or set of cpus.
Will launching with green threads do the trick?Yes.
Is there some way
to permit the use of native threads but to exclude a set of processors?
Yes.
== Rob
>
How do I do this under WLS318? WLS451?Any help is much appreciated.
>
-Adam Galper

Multi CPU Solaris.

Hi,
Is there a recommended number of Weblogic instances when running on a
Multi-CPU machine with more than 8, in this particular case - 28.
The server behaves really bad if I only run one instance there is too
much time spent in the treads waiting to obtain a lock for accessing a
SyncronizedMap (in
webblogic.kernel.ResettableThreadLocal.currentStorage()) and the CPUs
are underutilized.
After a few experiments we found out that 1 instance per 4-6 CPUs is OK,
but I was wondering whether you could recommend something. Also since
there's limit of 2GB per JVM if we wanted to utilize more then there is
no choice.
Thanks,
Deyan
[dejan_bektchiev.vcf]

Yes that what my problem is.
Thanks a lot.
--dejan
Dimitri Rakitine wrote:
It is not a hack - it is a trick ;-) (that's how WLS time services work). I suggested
it because it sounded like you identified synchronization contention caused by using
non-WebLogic threads in your application.
Deyan D. Bektchiev <[email protected]> wrote:
This is a multi-part message in MIME format.
--------------67801AC9090398390A36FFEF
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Dimitri,
Is this supported or is it really a hack?
Because I could still run multiple JVMs and when we want to utilize more memory we
are forced to do that anyway as the limit is just below 2GB/JVM and if you have even
16GB that already automatically means 7-8 JVMs which usually does the trick.
Thanks,
Deyan
Dimitri Rakitine wrote:
If using non-WebLogic threads is an immediate problem, you can try to use
this hack: http://dima.dhs.org/misc/LongRunningTask.jsp (MyThread class)
to use WebLogic Execute threads instead of creating your own. (it works
both on 5.1 and 6.0).
Deyan D. Bektchiev <[email protected]> wrote:
This is a multi-part message in MIME format.
--------------EAB0350757F4EBC4B593EB25
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Thanks Adam,
Actually it is true that most of our requests run on non-weblogic threads.
We have a thread pool that runs in the WLS JVM and it is created by a startup
class and afterwards is activated by sending JMS messages to a monitoring
thread that dispatches the requests. The clients connect to a Session EJB and
that session EJB launches the requests and afterwards the clients get their
results via JMS.
We easily support multiple JVMs on one physical server but if it wasn't the
performance hit from accessing that collection we'd prefer to have as few JVMs
as possible as this would also drive down the context switches and the total
number of threads in the system.
All the Best,
Deyan
Adam Messinger wrote:
Deyan,
Can you tell us a bit more about your application. That map in
ResettableThreadLocal shouldn't be hit except for non-WL threads. It is
unusual that this would be a source of contention.
That said, I know of many people who have been successful running multiple
server instances on a single big machine. I think that it is a great
solution if your application is amenable to it.
Cheers!
Adam
"Deyan D. Bektchiev" <[email protected]> wrote in message
news:[email protected]...
Hi,
Is there a recommended number of Weblogic instances when running on a
Multi-CPU machine with more than 8, in this particular case - 28.
The server behaves really bad if I only run one instance there is too
much time spent in the treads waiting to obtain a lock for accessing a
SyncronizedMap (in
webblogic.kernel.ResettableThreadLocal.currentStorage()) and the CPUs
are underutilized.
After a few experiments we found out that 1 instance per 4-6 CPUs is OK,
but I was wondering whether you could recommend something. Also since
there's limit of 2GB per JVM if we wanted to utilize more then there is
no choice.
Thanks,
Deyan
--------------EAB0350757F4EBC4B593EB25
Content-Type: text/x-vcard; charset=us-ascii;
name="dejan_bektchiev.vcf"
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begin:vcard
n:Bektchiev;Deyan
tel;home:1-650-363-6055
tel;work:1-650-289-1046
x-mozilla-html:TRUE
url:http://www.appl.net/
org:Application Networks
adr:;;444 Ramona St;Palo Alto;CA;94301;USA
version:2.1
email;internet:[email protected]
fn:Deyan D. Bektchiev
end:vcard
--------------EAB0350757F4EBC4B593EB25----
Dimitri
--------------67801AC9090398390A36FFEF
Content-Type: text/x-vcard; charset=us-ascii;
name="dejan_bektchiev.vcf"
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tel;home:1-650-363-6055
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x-mozilla-html:TRUE
url:http://www.appl.net/
org:Application Networks
adr:;;444 Ramona St;Palo Alto;CA;94301;USA
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email;internet:[email protected]
fn:Deyan D. Bektchiev
end:vcard
--------------67801AC9090398390A36FFEF----
Dimitri[dejan_bektchiev.vcf]

Repeating Job Can Hang In "Started" Status On Multi-Cpu Windows Machine

Dear All,
I am struck with a know Bug 3092358 "Repeating Job Can Hang In "Started" Status On Multi-Cpu Windows Machine". The Work around is mentioned in Note:307448.1 in metalinks.
In the above doc for the Fix-3 Another option that worked is to try:
Upgraded to EM 9.2.0.6 and applied the Apr05 CPU.
I searched in metalinks to get patch to upgrade EM from 9.2.0.1 to 9.2.0.6. But not able to find can some tell me where can i get this patch.
OS: windows 2003 server
DB:9.2.0.1
OWB :9.2
Pls,do let me know if there any other work arounds,
Thanks for your help.
Rgds,
Satya.

While I dunno the specifics of NT threads, one way to spread 1 thread across multiple processors is by simply round robining the thread between the processors over time. i.e. Thread A spends 0.5seconds executing on cpu 1, for the next 0.5 s the thread is moved over to cpu2 and executed there, then it is moved back to cpu1 and so on...
I think the Convex SPP used this model, the motivation perhaps being to spread load evenly among all cpus. Made sense in a multi-user multi-cpu system with a real fast bus.
cheers
-Ragu
You know you've been spending too much time on the computer when your friend misdates a check, and you suggest adding a "++" to fix it.

SIGBUS with -Xincgx/-Xconcgc for JDK 1.5 on multi-CPU system

Hi,
I've been having trouble with random crashes using 1.5.0_03 up to _07 on Solaris and Linux (x86), especially on multi-CPU hosts. This is for a Web server (Tomcat 4.1.x), where CMS has been wonderful in avoiding the sometimes-horrible (multi-minute) GC pauses that I otherwise saw inspite of paranoid care with memory (and other resource use) in my code.
I have sent in a few crash dumps via a variety of routes but none have so far surfaced in the public bug reports.
I suspect something like a missing memory barrier or 3 in the CMS code, as I have commented against one of the extant bug reports.
I have had to stop using -Xincgc/-Xconcgc on a 2-CPU machine, but as I have a T1000 due for delivery within the next week, I really do not want end up using a stop-the-world GC to avoid the JVM crashing!
Are any SIGBUS-type problems fixed in _08 or _09?
Rgds
Damon

We have found, and are in the process of fixing, at least two
long-standing bugs in the concurrent collector that may have
affected you. (But the latter is conjecture.)
Those bugs are still present in the public beta version of Mustang.
So, if you are able to reproduce the crashes with Mustang,
then please contact us at hotspotgc dash feedback at sun dot com
so we can have you test the fixes we have made, as well
as, if possible, get your test case so we can use it to test
the parallel/concurrent collector more thoroughly.
Refer to CR 6429181 and CR 6431128, and include a pointer
to this thread. At least two of the fixes we have in mind are, however,
orthogonal to the use of ParNew, and should exhibit even
if you turn off UseParNewGC.
By the way, a full complement of support options is available
at: developer.sun.com/services

What licence do I need to install server 2012 R2 standard on a single i-7 cpu machine?

What licence do I need to install server 2012 R2 standard on a single i-7 cpu (multi-core) machine?
Is a 2 processors licence OK?
Thanks.

Yes, you are all covered.

Clustering on multi cpu box without multicast

          Just wonder whether weblogic cluster can be configured to not use IP multicast
          if the clustered servers are running on the same multi cpu box as I would have
          thought that in memory communication would be a faster option in this case.
          This is again as we were told that Weblogic doesnt scale well for more than 2
          cpus per box.
          If we are using a 4-6 cpu box then in this case it makes more sense to have 2/3
          instances
          per server communicating via mem and not multicast


Just wonder whether weblogic cluster can be configured to not use IP          multicast
          > if the clustered servers are running on the same multi cpu box as I would
          have
          > thought that in memory communication would be a faster option in this
          case.
          Multicast with a TTL of zero is basically implemented by the OS as a shared
          memory approach, so there is usually very little difference in performance.
          > This is again as we were told that Weblogic doesnt scale well for more
          than 2
          > cpus per box.
          > If we are using a 4-6 cpu box then in this case it makes more sense to
          have 2/3
          > instances
          > per server communicating via mem and not multicast
          The scalability on various numbers of CPUs differs greatly. It is vastly
          improved on more recent versions of WebLogic with more recent versions of
          the JVM. Back on JVM 1.2 with WL 5.x and earlier, you would have to run
          multiple instances in order to "soak" a box. The best way to determine if
          this is still the case is to use a load test that (with everything else
          equal) will soak the box with multiple JVMs but not with a single one.
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com/coherence.jsp
          Tangosol Coherence: Clustered Replicated Cache for Weblogic
          "r g" <[email protected]> wrote in message
          news:3f181388$[email protected]..
          >

Simulating a multi-processor machine

Hi there,
I am writing a server-like application and would appreciate some of the guru's advice.
During the start up and running of this app, there are quite a few operations that could block the current thread. For example one of the start-up operations opens a socket. If the socket cannot be opened then it has to wait quite a while before throwing the TimeoutException.
This gives the application a slow feeling to it. (Not that any of GUI thread stuff is blocking, just the data comes through slowly).
Now I do know about Threading, and I can go that route quite easily, however I am not keen on the thread creation overhead (+-20k memory for each thread, even though most of the tasks are incredibly short lived)
What I am interested in is a hybrid approach. I was thinking of simulating a multi-processor machine. This would entail have a fixed number of Threads, and sending them work as the tasks arrive.
However to coordinate these threads, will require a fair amount of synchronized code, so I am not sure if it worth it.
Has anyone tried such an approach, or have any ideas about this?
Many thanks
-Philip.

Sorry about the double post,
please ignore this thread.
Wish there was a way for me to delete
this thread...
<Prays to Java Gods>

Is OAS 10.1.2.0.1/10.1.2.3 is multi CPU supported ?

Dear All,
We have a OAS 10.1.2.3 on Win2k3 SE with 8 CPU and 16 GB RAM. But, the CPU 4 and 8 are only used (50% Avg.) and rest of the CPU are almost idle (<5% Avg.). Why is this situation? Is there any limitation with ORACLE 10g AS on Windows SE.
OS Name    Microsoft(R) Windows(R) Server 2003 Standard x64 Edition
Version    5.2.3790 Service Pack 2 Build 3790
Other OS Description     R2
System Model    PowerEdge 2950
System Type    x64-based PC
Processor    EM64T Family 6 Model 23 Stepping 10 GenuineIntel ~2494 Mhz
Processor    EM64T Family 6 Model 23 Stepping 10 GenuineIntel ~2505 Mhz
Processor    EM64T Family 6 Model 23 Stepping 10 GenuineIntel ~2494 Mhz
Processor    EM64T Family 6 Model 23 Stepping 10 GenuineIntel ~2494 Mhz
Processor    EM64T Family 6 Model 23 Stepping 10 GenuineIntel ~2494 Mhz
Processor    EM64T Family 6 Model 23 Stepping 10 GenuineIntel ~2494 Mhz
Processor    EM64T Family 6 Model 23 Stepping 10 GenuineIntel ~2494 Mhz
Processor    EM64T Family 6 Model 23 Stepping 10 GenuineIntel ~2494 Mhz
BIOS Version/Date    Dell Inc. 2.5.0, 12.09.2008
SMBIOS Version    2.5
RAM                    16GbPlease help.
Thanks and Regards,
Anand.

How I compile my PHP with --with-oci8??

Installion problems on multi distro machine [solved]

Started with 0.7.2 i686, but had problems with that so I was advised to try 0.8. Just downloaded base-0.8-beta1-20070122-i686.iso image. Mdsum5 and burn verify no problem. However, I'm having lots of bother getting it installed on a machine containing other distros. So I tried installing on VMWare and had no problems whatsoever with either with the iso image or the burnt CD.
I had to use ide-legacy to boot the real machine. As the disk was already prepared I went straight to option 3. Set Filesystem Mountpoints and set the swap (overwrite), / (ext3/overwrite) and boot (ext2/no overwrite) partitions. Then on selecting all base packages I get I get error
checking package integrity...error: archive kernel-headers-2.6.19
Package installation failed
Continued with 4. configure system anyway and a get a load of mount point errors and the chroot fails. When I edit (vim) the list of configuration files, they're all empty and if I try to add anything I get error E212: Can't open file for writing. Obviously I can't set the password either.
So I thought I'd try the ftp base installl. The network set up was fine. Instead of the above package integrity error, I get
error: the following file conflicts were found :
grub: /mnt/boot/grub/menu.lst: exists in filesystem
errors occured, no packages were upgraded
Package installation failed
Also I get a load of errors on trying to install the kernel, but at least there was no package corruption.
I tried both methods a number of times. With the CD install I sometimes get more CD errors. With ftp base install I get exactly the same problems. I also tried preparing the disk within the install using cfdisk. However, when I deleted /dev/hda10 and created a new one, cdfisk wanted to rename most of the other partitions, so i didn't go ahead with that. I've seen this problem with cfdisk before.
I know I could move the virtual machine to the real machine, but I rather not have the hassle. Anyone got some workarounds?
Last edited by grazie (2007-02-18 16:43:40)

Thanks for your reply mutlu_inek.
mutlu_inek wrote:What do you mean by "overwrite"? Formatting?
Yes the installer gives the option to format or not, selected partitions during the installation. The app uses the terms overwrite/no overwrite.
mutlu_inek wrote:Maybe your designated /boot partition is corrupted (or not actually ext2)? Maybe you should try formatting it.
The /boot partition was ext2 and I wasn't aware of any corruption. The fsck check on booting was fine and no other distro was having problems. However, removing the kernels and config files or reformatting the /boot partition seemed like good option that I hadn't yet tried. I backed up the partition and allowed the installer to format/overwrite it during the install. This fixed all the problems.
mutlu_inek wrote:The partition naming/numbering sheme is ordered. If you delete a partition and then re-create it, it will have the same name. If you just delete it, names of partitions with higher numbers will change. That is not cfdisk specific, not even Linux-specific.
My disk has 10 partitions. Within cfdisk I deleted /dev/hda10 created and recreated it. However, rather than getting a new /dev/hda10 the partition was designated /dev/hda7 with the original 7, 8 and 9 all reassigned. I'd say this was a bug.

Whether solaris 8 os support dual cpu machine?

Hello :
Whether solaris 8 OS support dual-processor machine , When i install solaris 8 in a dual
process machine , I always can't install solaris OS .
Thanks !
Future

For Intel Architecture it is important that the system is in the HCL
(Hardware Compatibility List)
The list is available at:
http://soldc.sun.com/support/drivers/hcl/index.html#S8
SUN cannot guarantee that Solaris will work on every Intel Dual processor system.Once the machine is tested the machine is available in the HCL list.
HTH
-Dhruva

Configure weblogic on a multi-home machine

I want to run weblogic on a host with 2 IP addresses, and I want weblogic to listen to both ip addresses using the default port (7601).
On the admin console (under configuration-general), I tried enter two ip addresses on the "listen address" but after doing so, I cannot start weblogic.
(I want to do this to run Resonate load-balancer software - resonate creates a virtualIP addr besides my real IP addr, and weblogic needs to listen on both)
Thanks

i found the solution, instead of entering 2 IP adresses, just blank it out - that way it will bind to ANY addr avail on the local machine.
Thnaks
Henry

What does everyone recommend for a multi-function machine

We have a small office but need high speed printing and more importantly high speed scanning. We currently have a xerox workcentre that have been decent but is in need of repair. Instead of spending the money on that it is time for a new machine. I would like to stay away from xerox as I called them to help fix current machine and the only advice they would give me over the phone was two power down the machine for 15 seconds. Obviously this did not work and then they wanted $275 for the the 1st 15 minutes for a tech to come out, ridiculous. Anyway, what do you guys recommend? I am looking to spend around $2,500.

Call your local office equiptment service and sales, they can recommend the best product for your circumstances as they have exposure to many different machines and problems.

Interrupt in a multi-cpu machine

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