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ASM > SAM-QFS > Flashcards

SAM-QFS Flashcards

1
Q

What is QFS?

A

QFS is a high performance filesystem.

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2
Q

What is SAM-QFS?

A

A product that enables archiving filesystem data. It includes a storage and archive manager along with the Sun QFS filesystem.

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3
Q

What can SAM-QFS use as archive media?

A

Disk slices in another filesystem, removable tape or magneto-optical cartridges in automated or manually loaded storage devices.

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4
Q

Can you use QFS without SAM-QFS?

A

Yes

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5
Q

Can you use SAM-QFS without QFS?

A

No

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6
Q

What is the SAM-QFS manager?

A

A browser-based graphical user interface that enables you to confugre, control, protect, and monitor one or more file systems from a central location.

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7
Q

What is SAM-Remote

A

Sam remote is a client and server storage management system enabling sharing of libraries and other removable media devices in a SAM-QFS environment.

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8
Q

How do you configure SAM-Remote

A
  1. Create a Sun QFS filesystem
  2. Test the Sun QFS filesystem to verify that it’s configured properly
  3. Use the SAM-Remote instructions to enable remote storage and archive management.
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9
Q

What is HA-QFS?

A

A Sun QFS filessytem in an Oracle Solaris Cluster environment configured for high availability.

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10
Q

What is HA-SAM?

A

SAM-QFS configured for high availability using Oracle Solaris Cluster software. If the primary node fails, the cluster software automatically relocates the SAM-QFS archiving functions from a failed primary node to a designated secondary node. This requires the Sun QFS Sun Cluster agent, so this configuration must be installed with a shared Sun QFS filesystem that is mounted and managed by the Sun QFS Sun Cluster agent.

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11
Q

What’s the difference between Solaris and Linux Sun QFS clients?

A

The Linux clients are restricted to client-only behavior. They can’t be metadata servers. They also support interaction with SAM-QFS software, but have Sun QFS filesystem functionality only.

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12
Q

How do you set the online disk space threshold?

A

TBD

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13
Q

What are the design considerations for archiving?

A
  1. Access and usage patterns
  2. Filesystem sizes and usage patters, frequency of file updates, average file sizes, batch jobs that will wait for dries/media, users that must have priority
  3. Archiving policies: number of media copies, release policies, level of disk over-subscription
    4 Media characteristics: size, drive setup times
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14
Q

What is a ma type file system?

A

File system metadata only.

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15
Q

What is a ms type file system?

A

File system metadata and file data on the same device.

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16
Q

How many disk devices or partitions does a ma file system require?

A

Two. One for file data and one for metadata.

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17
Q

How many disk devices or partitions does a ms file system require?

A

One, on which file data and metadata are saved.

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18
Q

Why would you use multiple disk devices?

A

For increased I/O performance.

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19
Q

How do you format partitions for ma or ms file systems?

A

You don’t. They don’t require any special formatting.

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20
Q

What types of connection can be used from server to disks?

A

Fibre Channel or SCSI.

21
Q

How many metadata servers are required?

A

One.

22
Q

What requirements exist if you want to change the metadata server?

A

You have to have a spare available, and that spare must be running on the same hardware platform (SPARC vs x64)

23
Q

If you see the error “client package versionx mismatch, should be y.”, what does this mean?

A

It means you have different versions of SAM-QFS installed on hosts that are part of the same shared filesystem.

24
Q

What are the two possible configurations for SAM-QFS Manager software

A
  1. Stand-alone management station to manage one or more Sun QFS hosts
  2. Additional software on the Sun QFS host
25
Q

How do you estimate the disk cache size required?

A

Largest file in bytes + the amount of space needed for working files.

26
Q

How do you estimate the metadata cache size

A 
Must be large enough to contain:
1. Two copies of the superblock (2x16k)
2. Reservation maps for metadata space plus data space
3. Inode space (512/each)
4. Indirect blocks (16K each)
5 Directory data space (16K each)
27
Q

Can you mix media types within a library?

A

No. If you can partition your tape library into multiple virtual libraries, you can use one media type in each.

28
Q

How do you disable auto-boot on a solaris server?

A

setenv auto-boot? false at the ok> prompt

29
Q

How do you get a list of all target IDs and LUNS for each connected device from the ok> prompt?

A

probe-scsi-all

30
Q

How do you identify the libraries or tape drives from the ok> prompt?

A

ok show-devs
ok select /pci@1f,2000/SUNW,qlc@1
ok show-children

31
Q

How do you check to see if the expected tape devices exist from within the OS?

A

look at /dev/rmt

32
Q

How do you check to see if the expected disk devices exist from within the OS?

A

Look at /dev/dsk and /dev/rdsk.

33
Q

What are the SAM-QFS and QFS packages?

A

SUNWqfsr, SUNWqfsu (file system only)
SUNWsamfsr, SUNWsamfsu (archiving and file system)
SUNWfsmgrr, SUNWfsmgru (SAM-QFS manager)

34
Q

Where are the device special files for SAM-QFS?

A

/dev/samst

35
Q

Where are the software specific commands?

A

/etc/fs/samfs

36
Q

Where are the configuration files?

A

/etc/opt/SUNWsamfs

37
Q

Where are the site-customizable scripts

A

/etc/opt/SUNWsamfs/scripts

38
Q

Where are most of the SAMFS commands, binaries, libraries, includes, man pages, etc?

A

/opt/SUNWsamfs/*

39
Q

Where are the fault notification files?

A

/etc/opt/SUNWsamfs/scripts/sendtrap, /opt/SUNWsamfs/sbin/fault_log, /opt/SUNWsamfs/sbin/tapealert_log, /opt/SUNWsamfs/sbin/tapealert_trap

40
Q

Where is the main configuration file for SAM-QFS?

A

/etc/opt/SUNWsamfs/mcf

41
Q

Which configuration files are required if you’re only using the file system features?

A

/etc/opt/SUNWsamfs/samfs.cmd and defaults.conf.

42
Q

What is samfs.cmd for?

A

Filesystem mount parameters

43
Q

What is defaults.conf for?

A

.

44
Q

What is archiver.cmd for?

A

.

45
Q

What is preview.cmd for?

A

.

46
Q

What is recycler.cmd for?

A

.

47
Q

What is releaser.cmd for?

A

.

48
Q

What command do you use to install the QFS or SAM-QFS packages?

A

pkgadd

49
Q

How do you revert to a previous QFS or SAM-QFS version?

A
  1. /opt/SUNWsamfs/sbin/backto 5.2

2. Then remove the current release package

ASM (1 decks)

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