Re: [Samba] Samba4 Can we use two file-servers?

2012-06-26 Thread Mike Howard

On 26/06/2012 09:04, steve wrote:

Hi
We've just added a second DC to our domain, both DCs are Samba4

DC1 is also the s3fs file server. If that goes down then so does the 
file-server. IOW, we can still authenticate via DC2 but we cannot do 
any work!


What are my options here? Is it possible to sync the files to DC2 and 
use that in case of failure? Or maybe add a third box running smbd?


Cheers,
Steve
It depends on your needs. For me, I use a couple of arm plugs as PDC  
BDC for authentiaction and dns etc and file serve files from elsewhere, 
also plugs. Where ever you serve files from, if that box goes down you 
lose your data/file serving capability. You can use (software or 
hardware) raid to provide redundancy for the disks and/or a complete 
backup device for full HA.


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Re: [Samba] Samba4 Can we use two file-servers?

2012-06-26 Thread steve

On 26/06/12 11:54, Mike Howard wrote:

On 26/06/2012 09:04, steve wrote:

Hi
We've just added a second DC to our domain, both DCs are Samba4

DC1 is also the s3fs file server. If that goes down then so does the
file-server. IOW, we can still authenticate via DC2 but we cannot do
any work!

What are my options here? Is it possible to sync the files to DC2 and
use that in case of failure? Or maybe add a third box running smbd?

Cheers,
Steve

It depends on your needs. For me, I use a couple of arm plugs as PDC 
BDC for authentiaction and dns etc and file serve files from elsewhere,
also plugs. Where ever you serve files from, if that box goes down you
lose your data/file serving capability. You can use (software or
hardware) raid to provide redundancy for the disks and/or a complete
backup device for full HA.


Hi Mike
Sorry, my English is over 30 years old! Can you give me a one liner on 
plugs and HA in a S4 context?


We'd like to have a spare box with a backup of the data to substitute 
the DC/fileserver. What do you think about the possibility of syncing 
the data over to the secondary DC along with a copy of smb.conf and 
using that when the primary DC/fileserver goes down. Would the clients 
know to use the new fileserver: thinking about Kerberos here.


Cheers
Steve
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Re: [Samba] Samba4 Can we use two file-servers?

2012-06-26 Thread Daniel Müller
To have your data high available put it on a replicating GLUSTER vol
(glusterfs-as many Fileservers as you want).
Or replicate it with drbd master master (if 2 DCs are the limitation)

Good Luck
Daniel
 

---
EDV Daniel Müller

Leitung EDV
Tropenklinik Paul-Lechler-Krankenhaus
Paul-Lechler-Str. 24
72076 Tübingen

Tel.: 07071/206-463, Fax: 07071/206-499
eMail: muel...@tropenklinik.de
Internet: www.tropenklinik.de
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-Ursprüngliche Nachricht-
Von: samba-boun...@lists.samba.org [mailto:samba-boun...@lists.samba.org] Im
Auftrag von steve
Gesendet: Dienstag, 26. Juni 2012 12:23
An: samba@lists.samba.org
Betreff: Re: [Samba] Samba4 Can we use two file-servers?

On 26/06/12 11:54, Mike Howard wrote:
 On 26/06/2012 09:04, steve wrote:
 Hi
 We've just added a second DC to our domain, both DCs are Samba4

 DC1 is also the s3fs file server. If that goes down then so does the 
 file-server. IOW, we can still authenticate via DC2 but we cannot do 
 any work!

 What are my options here? Is it possible to sync the files to DC2 and 
 use that in case of failure? Or maybe add a third box running smbd?

 Cheers,
 Steve
 It depends on your needs. For me, I use a couple of arm plugs as PDC  
 BDC for authentiaction and dns etc and file serve files from 
 elsewhere, also plugs. Where ever you serve files from, if that box 
 goes down you lose your data/file serving capability. You can use 
 (software or
 hardware) raid to provide redundancy for the disks and/or a complete 
 backup device for full HA.

Hi Mike
Sorry, my English is over 30 years old! Can you give me a one liner on plugs
and HA in a S4 context?

We'd like to have a spare box with a backup of the data to substitute the
DC/fileserver. What do you think about the possibility of syncing the data
over to the secondary DC along with a copy of smb.conf and using that when
the primary DC/fileserver goes down. Would the clients know to use the new
fileserver: thinking about Kerberos here.

Cheers
Steve
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Re: [Samba] Samba4 Can we use two file-servers?

2012-06-26 Thread Mike Howard

On 26/06/2012 11:22, steve wrote:

On 26/06/12 11:54, Mike Howard wrote:

On 26/06/2012 09:04, steve wrote:

Hi
We've just added a second DC to our domain, both DCs are Samba4

DC1 is also the s3fs file server. If that goes down then so does the
file-server. IOW, we can still authenticate via DC2 but we cannot do
any work!

What are my options here? Is it possible to sync the files to DC2 and
use that in case of failure? Or maybe add a third box running smbd?

Cheers,
Steve

It depends on your needs. For me, I use a couple of arm plugs as PDC 
BDC for authentiaction and dns etc and file serve files from elsewhere,
also plugs. Where ever you serve files from, if that box goes down you
lose your data/file serving capability. You can use (software or
hardware) raid to provide redundancy for the disks and/or a complete
backup device for full HA.


Hi Mike
Sorry, my English is over 30 years old! Can you give me a one liner on 
plugs and HA in a S4 context?


We'd like to have a spare box with a backup of the data to substitute 
the DC/fileserver. What do you think about the possibility of syncing 
the data over to the secondary DC along with a copy of smb.conf and 
using that when the primary DC/fileserver goes down. Would the clients 
know to use the new fileserver: thinking about Kerberos here.


Cheers
Steve
Sorry, by plug I meant Sheevaplug/Dreamplug/Guruplug which arem compact, 
low power arm devices. HA is High Availability, put (over) simply, the 
provision of backup devices/components in case of failure.


Daniel mentioned in another reply, you can use GlusterFS (NAS type 
approach) to aggregate your data (you still need somewhere to aggregate 
it to though) or replication if your restricted to the two DCs, though 
I've never tried that approach. In either case the switch (of where data 
is accessed) should be automated from a client perspective.


Cheers,
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