|
Home > Archive > Data Storage > February 2006 > Data Movers in Celerra CFS-14
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
| Author |
Data Movers in Celerra CFS-14
|
|
| sharadjain83@gmail.com 2006-02-14, 5:47 pm |
| The project that I am working on involves Celerra, Symmetrix and
Connectrix. Some questions that I have related to Celerra:
1. How is the data mover mapped to a storage space. Celerra has 14
data movers and Symmetrix contain disks for storage but how are disks
mapped to the data movers?
2. Celerra CFS-14 contains data movers that act as file servers. What
is this file server/data mover, is it a hardware, an application or an
operating system.
3. Data Mover has an operating system (DART) of its own but does
Celerra has its own OS. If not, then how is the failover protection of
Data Movers, configuration and management done? Is Celerra CFS-14 just
a cabinet that contains Data Movers, control stations and Power
supplies.
4. Data Movers are somehow connected to the storage disks but how is
the NAS device (Celerra CFS 14 containing Data Movers) connected to the
client machines which require transfer and access of files.
5. Does a file server has a file system of its own. Data Mover acts as
a file server and it has an operating system DART. Each Data Mover has
a file system of its own?
Thanks in advance
| |
|
| On 14 Feb 2006 09:23:21 -0800, sharadjain83@gmail.com wrote:
Wow... so many Celerra questions. EMC must be having a push on. ;)
>1. How is the data mover mapped to a storage space. Celerra has 14
>data movers and Symmetrix contain disks for storage but how are disks
>mapped to the data movers?
In exactly the same way that a Unix server connects to disks... the
Celerra Data Mover (DM) mounts volumes presented to it over the SAN
(Connectrix). There is a 'mount' command to do this. Let me know if
you want more info.
AFAICR the volumes for Celerra are standard Open System volumes on the
Symm... there may have been a special flag for them, but it was just
housekeeping.
>2. Celerra CFS-14 contains data movers that act as file servers. What
>is this file server/data mover, is it a hardware, an application or an
>operating system.
A Data Mover is physical hardware. It's an Intel-based PC with Fibre
Channel and NIC cards.
>3. Data Mover has an operating system (DART) of its own but does
>Celerra has its own OS. If not, then how is the failover protection of
>Data Movers, configuration and management done? Is Celerra CFS-14 just
>a cabinet that contains Data Movers, control stations and Power
>supplies.
The Data Mover OS is, as you know, DART.
The CFS-14 cab will also have one or two (should be two... but some
people try skimp and only have one) Control Stations - they look
physically very similar to a DM.
The Control Station (CS) manages the Data Movers via a private LAN. It
is responsible for initiating failovers. It runs a cut-down version
of Red Hat Linux. If you don't have a CS running, your DMs won't fail
over - hence the reason you should have two Control Stations.
Technically speaking, the CFS-14 is just the cabinet and power
supplies. The DMs and CSs are, in effect, plug-in modules.
>4. Data Movers are somehow connected to the storage disks but how is
>the NAS device (Celerra CFS 14 containing Data Movers) connected to the
>client machines which require transfer and access of files.
The DMs have two Fibre Channel HBAs each and are connected to the
Symmetrix through the SAN, in your case, the Connectrix switches.
The DMs also have NICS, the exact config will vary depending on your
environment, but most DMs have GbE NICs... hook these up to your LAN
and off you go. <-- a gross oversimplification, but you get the idea.
>5. Does a file server has a file system of its own. Data Mover acts as
>a file server and it has an operating system DART. Each Data Mover has
>a file system of its own?
Yes, each DM has it's own copy of DART.
It sounds like you've inherited this system, by the references to the
CFS-14... which AFAIK EMC aren't selling anymore. I'd strongly
encourage you to attend an EMC training course on this product as it's
quite complex and you can really get it wrong if you don't know your
way around it.
HVB.
|
|
|
|
|