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Re: Dennis Ritchie has died. A suggestion

2011-10-14 Thread Odhiambo Washington
On Fri, Oct 14, 2011 at 19:17, Kruppa, Peter Ulrich ulr...@pukruppa.dewrote:



 On 13.10.2011 23:43, mikel king wrote:


 On Oct 13, 2011, at 4:38 PM, Roland Smith wrote:

  With the recent death of Dennis Ritchie, we've lost one of the giants on
 whose
 shoulders we are standing. But rather that mourn his passing, I think it
 would
 be proper to remember and celebrate his achievements.

 His contributions to the C language and the UNIX operating system are a
 legacy that few can match.

 Therefore I would like to propose that the FreeBSD project dedicate the
 upcoming 9.0 release in his memory.

 I believe this would be an appropriate gesture.


+1

FreeBSD-9 Codename Ritchie.

-- 
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
I can't hear you -- I'm using the scrambler.
Please consider the environment before printing this email.
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Re: Very large swap

2011-10-14 Thread Nikos Vassiliadis

On 10/14/2011 8:08 AM, Dennis Glatting wrote:


This is kind of stupid question but at a minimum I thought it would be
interesting to know.

What is the limitations in terms of swap devices under RELENG_8 (or 9)?

A single swap dev appears to be limited to 32GB (there are truncation
messages on boot). I am looking at a possible need of 2-20TB (probably
more) with as much main memory that is affordable.


The limit is raised to 256GB in HEAD and RELENG_8
http://svnweb.freebsd.org/base?view=revisionamp;revision=225076


I am working with large data sets and there are various ways of solving
the problem sets but simply letting the processors swap as they work
through a given problem is a possible technique.


I would advise against this technique. Possibly, it's easier to design
your program to user smaller amounts of memory and avoid swapping.

After all, designing your program to use big amounts of swapped out
memory *and* perform in a timely manner, can be very challenging.

Nikos
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lock order reversal @ FreeBSD 9.0B3

2011-10-14 Thread Antonio Vieiro
Hi all,

I'm seeing weird messages at dmesg saying someting about lock order
reversal (see below) on my FreeBSD 9.0 beta 3.

I think this has something to do with the filesystem, so I'm a little
bit worried. Does anybody know if this is a known bug? (If so, how do
you know?) Shall I report it?

Thanks,
Antonio

P.S.: Details

lock order reversal:
 1st 0xc86d88d8 ufs (ufs) @ /usr/src/sys/kern/vfs_syscalls.c:3572
 2nd 0xe0778a00 bufwait (bufwait) @ /usr/src/sys/ufs/ffs/ffs_vnops.c:260
 3rd 0xc86d86b8 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2134
KDB: stack backtrace:
db_trace_self_wrapper(c0eff6ac,632e7262,3331323a,6f000a34,632e7370,...)
at db_trace_self_wrapper+0x26
kdb_backtrace(c0a42bdb,c0f03028,c6d65370,c6d69338,ef34190c,...) at
kdb_backtrace+0x2a
_witness_debugger(c0f03028,c86d86b8,c0ef2288,c6d69338,c0f0ad74,...) at
_witness_debugger+0x25
witness_checkorder(c86d86b8,9,c0f0ad74,856,0,...) at witness_checkorder+0x839
__lockmgr_args(c86d86b8,80100,c86d86d8,0,0,...) at __lockmgr_args+0x824
ffs_lock(ef341a34,c0a53e1b,c0f0a05e,80100,c86d8660,...) at ffs_lock+0x8a
VOP_LOCK1_APV(c10493e0,ef341a34,c794d670,c1059a80,c86d8660,...) at
VOP_LOCK1_APV+0xb5
_vn_lock(c86d8660,80100,c0f0ad74,856,4,...) at _vn_lock+0x5e
vget(c86d8660,80100,c794d5c0,50,0,...) at vget+0xb9
vfs_hash_get(c7447ca8,7af825,8,c794d5c0,ef341b78,...) at vfs_hash_get+0xe6
ffs_vgetf(c7447ca8,7af825,8,ef341b78,1,...) at ffs_vgetf+0x49
softdep_sync_buf(c86d8880,e07789a0,1,106,0,...) at softdep_sync_buf+0xac9
ffs_syncvnode(c86d8880,1,c794d5c0,c86a03b8,c86d892c,...) at ffs_syncvnode+0x24c
ffs_fsync(ef341c48,ef341cec,0,ef341c48,ef341c6c,...) at ffs_fsync+0x27
VOP_FSYNC_APV(c10493e0,ef341c48,c0f0c048,df9,0,...) at VOP_FSYNC_APV+0xa5
sys_fsync(c794d5c0,ef341cec,c0f493b6,c0eebb0e,286,...) at sys_fsync+0x1df
syscall(ef341d28) at syscall+0x284
Xint0x80_syscall() at Xint0x80_syscall+0x21
--- syscall (95, FreeBSD ELF32, sys_fsync), eip = 0x2859a1c7, esp =
0xbfbfe1bc, ebp = 0xbfbfe1d8 ---
pid 2085 (perl5.12.4), uid 0: exited on signal 6 (core dumped)
pid 2083 (perl5.12.4), uid 0: exited on signal 6 (core dumped)
lock order reversal:
 1st 0xe07a0e24 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2658
 2nd 0xc86b5200 dirhash (dirhash) @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:284
KDB: stack backtrace:
db_trace_self_wrapper(c0eff6ac,7366752f,7366752f,7269645f,68736168,...)
at db_trace_self_wrapper+0x26
kdb_backtrace(c0a42bdb,c0f0300f,c6d65370,c6d69408,f15327e8,...) at
kdb_backtrace+0x2a
_witness_debugger(c0f0300f,c86b5200,c0f31d92,c6d69408,c0f31a17,...) at
_witness_debugger+0x25
witness_checkorder(c86b5200,9,c0f31a17,11c,0,...) at witness_checkorder+0x839
_sx_xlock(c86b5200,0,c0f31a17,11c,c8893828,...) at _sx_xlock+0x85
ufsdirhash_acquire(e07a0dc4,c8893828,f1532918,e5263e74,f15328b8,...)
at ufsdirhash_acquire+0x35
ufsdirhash_add(c8893828,f1532918,3e74,f15328a4,f15328a8,...) at
ufsdirhash_add+0x13
ufs_direnter(c889caa0,c89a5660,f1532918,f1532bc0,0,...) at ufs_direnter+0x739
ufs_makeinode(f1532bc0,0,f1532b04,f1532a60,c0d5fc85,...) at ufs_makeinode+0x59d
ufs_create(f1532b04,f1532b1c,0,0,f1532b80,...) at ufs_create+0x30
VOP_CREATE_APV(c10493e0,f1532b04,f1532bc0,f1532a9c,0,...) at VOP_CREATE_APV+0xa5
vn_open_cred(f1532b80,f1532c48,1a4,0,c74ce280,...) at vn_open_cred+0x215
vn_open(f1532b80,f1532c48,1a4,c86a3508,2835a000,...) at vn_open+0x3b
kern_openat(c7ac6b80,ff9c,289ffa60,0,a03,...) at kern_openat+0x1ec
kern_open(c7ac6b80,289ffa60,0,a02,1b4,...) at kern_open+0x35
sys_open(c7ac6b80,f1532cec,c,f1532d80,282,...) at sys_open+0x30
syscall(f1532d28) at syscall+0x284
Xint0x80_syscall() at Xint0x80_syscall+0x21
--- syscall (5, FreeBSD ELF32, sys_open), eip = 0x282b1343, esp =
0xbf9f100c, ebp = 0xbf9f1038 ---
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Re: Very large swap

2011-10-14 Thread Tim Daneliuk

On 10/14/2011 11:43 AM, Nikos Vassiliadis wrote:

On 10/14/2011 8:08 AM, Dennis Glatting wrote:


This is kind of stupid question but at a minimum I thought it would be
interesting to know.

What is the limitations in terms of swap devices under RELENG_8 (or 9)?

A single swap dev appears to be limited to 32GB (there are truncation
messages on boot). I am looking at a possible need of 2-20TB (probably
more) with as much main memory that is affordable.


The limit is raised to 256GB in HEAD and RELENG_8
http://svnweb.freebsd.org/base?view=revisionamp;revision=225076


I am working with large data sets and there are various ways of solving
the problem sets but simply letting the processors swap as they work
through a given problem is a possible technique.


I would advise against this technique. Possibly, it's easier to design
your program to user smaller amounts of memory and avoid swapping.

After all, designing your program to use big amounts of swapped out
memory *and* perform in a timely manner, can be very challenging.

Nikos


Well ... I dunno how much large dataset processing you've done, but
it's not that simple.  Ordinarily, with modern machines and
architectures, you're right.  In fact, you NEVER want to swap,
instead, throw memory at the problem.

But when you get into really big datasets, it's a different story.
You probably will not find a mobo with 20TB memory capacity :)
So ... you have to do something with disk.  You generally get
two choices:  Memory mapped files or swap.  It's been some years
since I considered either seriously, but they do have some tradeoffs.
MM files give the programmer very fine grained control of just what
might get pushed out to disk at the cost of user space context
switching.  Swap gets managed by the kernel which is about as
efficient as disk I/O is going to get, but that means what and how
things get moved on- and off disk is invisible to the application.

What a lot of big data shops are moving to is SSD for such operations.
SSD is VERY fast and can be RAIDed to overcome the tendency of at least
the early SSD products' tendency to, um ... blow up.

As always, scale is hard, and giant data problems are Really Hard (tm).
That's why people like IBM, Sun/Oracle, and Teradata make lots of money
building giant iron farms.

'Just my 2^1 cents worth ...


--

Tim Daneliuk tun...@tundraware.com
PGP Key: http://www.tundraware.com/PGP/

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Re: Dennis Ritchie has died. A suggestion

2011-10-14 Thread Pegasus Mc Cleaft
On Friday 14 October 2011 00:46:43 Chip Camden wrote:
   Alternatively, an tribute on the FreeBSD website would be fitting,
   wouldn't it?
   
   Roland
  
  I think this would be a fitting tribute...
 
 Hear, hear!

A good friend of mine posted to me, I think, one of the best tributes:

printf(goodbye, dad.\n);

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Re: lock order reversal @ FreeBSD 9.0B3

2011-10-14 Thread Lowell Gilbert
That looks like LOR #261, known not be a problem.
[ http://ipv4.sources.zabbadoz.net/freebsd/lor.html ] 
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Re: Dennis Ritchie has died. A suggestion

2011-10-14 Thread Mike Jeays
On Fri, 14 Oct 2011 18:17:15 +0200
Kruppa, Peter Ulrich ulr...@pukruppa.de wrote:

 
 
 On 13.10.2011 23:43, mikel king wrote:
 
  On Oct 13, 2011, at 4:38 PM, Roland Smith wrote:
 
  With the recent death of Dennis Ritchie, we've lost one of the giants on 
  whose
  shoulders we are standing. But rather that mourn his passing, I think it 
  would
  be proper to remember and celebrate his achievements.
 
  His contributions to the C language and the UNIX operating system are a
  legacy that few can match.
 
  Therefore I would like to propose that the FreeBSD project dedicate the
  upcoming 9.0 release in his memory.
 I believe this would be an appropriate gesture.
 
 Regards
 
 Peter.
 -- 
 
 Peter Ulrich Kruppa
 Wuppertal
 Germany
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I am strongly in favour of such a gesture, as an exceptional case.
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Re: Dennis Ritchie has died. A suggestion

2011-10-14 Thread Gary Kline
On Thu, Oct 13, 2011 at 05:43:25PM -0400, mikel king wrote:
 Date: Thu, 13 Oct 2011 17:43:25 -0400
 From: mikel king mikel.k...@olivent.com
 Subject: Re: Dennis Ritchie has died. A suggestion
 To: Roland Smith rsm...@xs4all.nl
 Cc: FreeBSD questions freebsd-questions@freebsd.org
 X-Mailer: Apple Mail (2.1084)
 
 
 On Oct 13, 2011, at 4:38 PM, Roland Smith wrote:
 
  With the recent death of Dennis Ritchie, we've lost one of the giants on 
  whose
  shoulders we are standing. But rather that mourn his passing, I think it 
  would
  be proper to remember and celebrate his achievements.


both dennis's and ken's ... and for that matter the entire
bunch from murry hill.  somewhere in my jumble of books in
my True Bible, 'the c programming language' that i had
dennis autograph 20+ years ago.  in my NSHO, that book is
the best book every written. it's just one of dennis's
achievements[!]


  
  His contributions to the C language and the UNIX operating system are a
  legacy that few can match.
  
  Therefore I would like to propose that the FreeBSD project dedicate the
  upcoming 9.0 release in his memory.
  
  Alternatively, an tribute on the FreeBSD website would be fitting, wouldn't 
  it?
  
  Roland
  -- 
  R.F.Smith   http://www.xs4all.nl/~rsmith/
  [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated]
  pgp: 1A2B 477F 9970 BA3C 2914  B7CE 1277 EFB0 C321 A725 (KeyID: C321A725)
 
 
 I think this would be a fitting tribute...


hm.  given that ken finished up at berkeley in '69 and
'70, isn't it overdue to have at least a page that mentions
the BSD link to its origin and inspiration?  


{sigh}

gary


 
 
 Regards,
 Mikel King
 mikel.k...@olivent.com
 o: 631.627.3055 | c: 646.530.3320 | skype: mikel.king | 
 http://bit.ly/mk-resume
 http://bit.ly/mk-twttr | http://linkd.in/mk-in | http://on.fb.me/mk-fb | 
 http://bit.ly/mk-contact
 
 
 
 
 
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-- 
 Gary Kline  kl...@thought.org  http://www.thought.org  Public Service Unix
   Journey Toward the Dawn, E-Book: http://www.thought.org
  The 8.51a release of Jottings: http://jottings.thought.org

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Re: Freebsd, Virtual OSs and GUI

2011-10-14 Thread Jorge Biquez

Hello all.

Thanks for you comments and advice.

Jorge Biquez

At 10:55 p.m. 12/10/2011, Carl Johnson wrote:

Adam Vande More amvandem...@gmail.com writes:

 On Wed, Oct 12, 2011 at 5:38 PM, Jorge Biquez 
jbiq...@intranet.com.mxwrote:


 It is better to install KDE or GNOME as the base GUI or it is 
better to have

 any other ? (I do not know what could be).


 This is one of those ask a hundred different people get 100 different
 answers.  I prefer KDE which would work well for you because both KDE and
 VirtualBox are built on QT4, a rather large system.  KDE isn't really that
 heavy though relatively speaking.  VirtualBox runs great for me 
and does all

 you indicated.



 What do you think is the best option to save hardware resources and
 accomplish this task ? Something important is that this lab 
machine will be

 connected directly with the ISP (public IP's)  and I will need to connect
 remotely to control the server and the other OS's.


 You will probably want a CPU and chipset that has hardware assist for
 virtualization, and plenty of RAM for both host and guests.  Disk choice
 should reflect your data capacity, redundancy, and speed needs.  A good
 quality Intel NIC is always nice.

If the OP is going to run a 64-bit OS, then hardware vitualization
assist is *required* for VirtualBox to handle it.  It is not required
when VirtualBox is running a 32-bit OS.  Just another minor detail to
consider.

--
Carl Johnsonca...@peak.org

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Re: Dennis Ritchie has died. A suggestion

2011-10-14 Thread Mariano Vecchioli
+1 to Codename Ritchie.

Mariano Vecchioli
wormintr...@gmail.com



On Fri, Oct 14, 2011 at 7:11 PM, Gary Kline kl...@thought.org wrote:

 On Thu, Oct 13, 2011 at 05:43:25PM -0400, mikel king wrote:
  Date: Thu, 13 Oct 2011 17:43:25 -0400
  From: mikel king mikel.k...@olivent.com
  Subject: Re: Dennis Ritchie has died. A suggestion
  To: Roland Smith rsm...@xs4all.nl
  Cc: FreeBSD questions freebsd-questions@freebsd.org
  X-Mailer: Apple Mail (2.1084)
 
 
  On Oct 13, 2011, at 4:38 PM, Roland Smith wrote:
 
   With the recent death of Dennis Ritchie, we've lost one of the giants
 on whose
   shoulders we are standing. But rather that mourn his passing, I think
 it would
   be proper to remember and celebrate his achievements.


 both dennis's and ken's ... and for that matter the entire
bunch from murry hill.  somewhere in my jumble of books in
my True Bible, 'the c programming language' that i had
dennis autograph 20+ years ago.  in my NSHO, that book is
the best book every written. it's just one of dennis's
achievements[!]


  
   His contributions to the C language and the UNIX operating system are a
   legacy that few can match.
  
   Therefore I would like to propose that the FreeBSD project dedicate the
   upcoming 9.0 release in his memory.
  
   Alternatively, an tribute on the FreeBSD website would be fitting,
 wouldn't it?
  
   Roland
   --
   R.F.Smith
 http://www.xs4all.nl/~rsmith/
   [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much
 appreciated]
   pgp: 1A2B 477F 9970 BA3C 2914  B7CE 1277 EFB0 C321 A725 (KeyID:
 C321A725)
 
 
  I think this would be a fitting tribute...


 hm.  given that ken finished up at berkeley in '69 and
'70, isn't it overdue to have at least a page that mentions
the BSD link to its origin and inspiration?


{sigh}

gary


 
 
  Regards,
  Mikel King
  mikel.k...@olivent.com
  o: 631.627.3055 | c: 646.530.3320 | skype: mikel.king |
 http://bit.ly/mk-resume
  http://bit.ly/mk-twttr | http://linkd.in/mk-in | http://on.fb.me/mk-fb |
 http://bit.ly/mk-contact
 
 
 
 
 
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  freebsd-questions@freebsd.org mailing list
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 freebsd-questions-unsubscr...@freebsd.org
 

 --
  Gary Kline  kl...@thought.org  http://www.thought.org  Public Service
 Unix
   Journey Toward the Dawn, E-Book: http://www.thought.org
  The 8.51a release of Jottings: http://jottings.thought.org

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Re: Very large swap

2011-10-14 Thread Dennis Glatting



On Fri, 14 Oct 2011, Tim Daneliuk wrote:


On 10/14/2011 11:43 AM, Nikos Vassiliadis wrote:

On 10/14/2011 8:08 AM, Dennis Glatting wrote:


This is kind of stupid question but at a minimum I thought it would be
interesting to know.

What is the limitations in terms of swap devices under RELENG_8 (or 9)?

A single swap dev appears to be limited to 32GB (there are truncation
messages on boot). I am looking at a possible need of 2-20TB (probably
more) with as much main memory that is affordable.


The limit is raised to 256GB in HEAD and RELENG_8
http://svnweb.freebsd.org/base?view=revisionamp;revision=225076


I am working with large data sets and there are various ways of solving
the problem sets but simply letting the processors swap as they work
through a given problem is a possible technique.


I would advise against this technique. Possibly, it's easier to design
your program to user smaller amounts of memory and avoid swapping.

After all, designing your program to use big amounts of swapped out
memory *and* perform in a timely manner, can be very challenging.

Nikos


Well ... I dunno how much large dataset processing you've done, but
it's not that simple.  Ordinarily, with modern machines and
architectures, you're right.  In fact, you NEVER want to swap,
instead, throw memory at the problem.

But when you get into really big datasets, it's a different story.
You probably will not find a mobo with 20TB memory capacity :)
So ... you have to do something with disk.  You generally get
two choices:  Memory mapped files or swap.  It's been some years
since I considered either seriously, but they do have some tradeoffs.
MM files give the programmer very fine grained control of just what
might get pushed out to disk at the cost of user space context
switching.  Swap gets managed by the kernel which is about as
efficient as disk I/O is going to get, but that means what and how
things get moved on- and off disk is invisible to the application.

What a lot of big data shops are moving to is SSD for such operations.
SSD is VERY fast and can be RAIDed to overcome the tendency of at least
the early SSD products' tendency to, um ... blow up.

As always, scale is hard, and giant data problems are Really Hard (tm).
That's why people like IBM, Sun/Oracle, and Teradata make lots of money
building giant iron farms.



This is a proof-of-concept project that is personally educational with a 
substantial amusement factor. I am doing it on the cheap, which means 
commercial products. I'm also doing it at home, which means expenses come 
out of my pocket.


This project is about manipulating and creating large data sets for crypto 
related applications (use your imagination here). The manipulations are 
fairly stupid and generally I am using UNIX utilities because I don't want 
to re-invent existing code (I'm not that bored). I have also written some 
programs but they are no more than a few pages of code. I am also using 
MPI, OpenMP, and pthreads where supported and make sense.


I have committed to the project five machines. Three (the 'attack' 
machines) run over clocked Phenom II x6 processors with 16GB of RAM, 1TB 
disk for the OS, 1TB disk for Junk, and a 3-2TB disk RAIDz array. Two of 
the three MBs (ASUS CROSSHAIR V FORMULA, Gigabyte GA-990FXA-UD7, and 
something I had lying around) are upgradable to 8150s, which I have one on 
order. These machines are liquid cooled because, well, for no reason in 
particular other than I thought it would be fun (defiantly educational). 
Roughly fifty percent of the parts were lying around but more importantly 
my wife and I keep our finances separate. :)


A data manipulation server is running an i7 x4 (not over clocked but turbo 
is enabled) with 24GB of fast RAM. It has 12 2TB disks, 2 1TB disks (OS), 
plus a few SSDs configured across three volumes (OS, Junk, and a work 
volume).


A repository server is an i7 x6 3.3GHz (not over clocked) with 24GB of 
RAM, several volumes, two of which are RAIDz, SSDs, and other junk. I NFS 
the data to the attack servers from this server.


I am using an Intel Gb card, picked because it supports large MTUs.

All are running RELENG_8.

If this project moves beyond proof-of-concept, and therefore not my money, 
we're talking about 100-1,000 TB of data with real servers (SMART, iLO, a 
NMS, etc). I have my doubts this will happen but in the mean time it's 
play day.



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Re: Freebsd, Virtual OSs and GUI

2011-10-14 Thread Chris Brennan
On Friday, October 14, 2011, Jorge Biquez jbiq...@intranet.com.mx wrote:
 Hello all.

 Thanks for you comments and advice.

 Jorge Biquez

 At 10:55 p.m. 12/10/2011, Carl Johnson wrote:

 Adam Vande More amvandem...@gmail.com writes:

 On Wed, Oct 12, 2011 at 5:38 PM, Jorge Biquez jbiq...@intranet.com.mxwrote:

 It is better to install KDE or GNOME as the base GUI or it is better to have
 any other ? (I do not know what could be).


 This is one of those ask a hundred different people get 100 different
 answers.  I prefer KDE which would work well for you because both KDE and
 VirtualBox are built on QT4, a rather large system.  KDE isn't really that
 heavy though relatively speaking.  VirtualBox runs great for me and does all
 you indicated.



 What do you think is the best option to save hardware resources and
 accomplish this task ? Something important is that this lab machine will be
 connected directly with the ISP (public IP's)  and I will need to connect
 remotely to control the server and the other OS's.


 You will probably want a CPU and chipset that has hardware assist for
 virtualization, and plenty of RAM for both host and guests.  Disk choice
 should reflect your data capacity, redundancy, and speed needs.  A good
 quality Intel NIC is always nice.

 If the OP is going to run a 64-bit OS, then hardware vitualization
 assist is *required* for VirtualBox to handle it.  It is not required
 when VirtualBox is running a 32-bit OS.  Just another minor detail to
 consider.

 --
 Carl Johnson            ca...@peak.org

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Just as a sidenote, you don't need to install something as large as
kde or Gnome where flu box/openbox/blackbox or KFCE will suffice. Why
overburden yourself with extra's that could potentially ruin any
testing? Especially if all of the os's you mention will be running at
once. You could also look at qemu, it isn't the easiest to use at
times, but it can be used entirely from the cmdln. I've used it before
to run gentoo from a FreeBSD host, and it did so very nicely.

-- 


 --
 Chris Brennan
 A: Yes.
 Q: Are you sure?
 A: Because it reverses the logical flow of conversation.
 Q: Why is top posting frowned upon?
 http://xkcd.com/84/ | http://xkcd.com/149/ | http://xkcd.com/549/
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Approximate date of RC1?

2011-10-14 Thread Brett Glass
Just wondering if a date has been set for posting of FreeBSD 
9.0-RC1. I have some servers to build that will need fixes made after BETA3


--Brett Glass

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