Check the previous 50 TSM Interview Questions
51) what wiil u do when the recovery
log reaches to 95%
?
first cancel
the all the process except database back up.
Then go for
show logpin to check which session is
pinning the recovery log and cancel that sessions
Cancel session sessionno
52) what will u do when the
migration is slow ?
storge pool
migration depends on no of mount points
in the library,
Increase the
no of migration processes.
Avoid
migration during back up.
53) what will u do when migration fail?
when there is
no scratch volumes available available
in target storage pool the migration may fail. If there is no tape drives
available then migration may fail.
Sol) update the storage pool to increase the scrstch volumes.
Verify the if
any of the drives are offline then
update the path and drive.
54) what reason the database back up
fails ?
if there is
no tape drives availability, no scratch volumes available.
55) how to take the db back up?
backup db
decvice class=devcname type=full/inc/snapshot
56) How to restore a client file ?
restore filepath
–su=yes.
57) interactive mode and non inter
active mode?
inter active
mode: dsmc with out parameter invoke the command line.
Non inter
active mode:dsmc with parameter invokes the commandline
58) how can u migrate the data
manually
?
migrate stg
stgname lowmig= %
59) how can u do the reclamation
manually?
reclaim stg
stgname
60) what is inventory expiration?
inventory
expiration is the process to delete the expired data(the data which is expire
based on the copy group parameters)
Also Read: Difference between Server-side and Client-side Deduplication
Also Read: Difference between Server-side and Client-side Deduplication
61) what is scheduling ?what are the
types of scheduling ?
scheduling is
use to automate the process of
administrative commands and baclient operation at specific date and time
when the schedule is activated.
1)administrative
schedule
2)client
scheduling
Scheduling
modes :client polling ,sever promted
Client
polling:in tmis mode client contact the server
to find out whether there is schedule defined for him and when should
run it
62) how can u check the no of drives
?
q drive
63) how many no of slots in ur library ?
it’s based on
the model (700) ,no of i/o slots in 60, scrath volumes 20
64) If one of the node tsm client
was not working properly, Some time client was working some time it was giving
tcp port error?
Reason: There
may be another session in the client using the same port. So inform the network
admin to change the port number of that service
65) Some time schedules got failed because of
password expired for the node?
Need to
register the nodes with thr proper password expire value as per ur environment policy Here
I am registering the nodes with the password expiry as "zero".
66)
TSM DB "cache hit ratio"
should between 98% to 100%. But in our TSM server it was less than 97?
Action:
I have
increased the "buffer pool size" as per the below values. now it is
more than 99% always.
System
(RAM)Memory (MB) Recommended Buffer
Pool Size (KB) Recommended Buffer Pool
Size (MB)
256
32678 32
512
65536 64
1024
131072 128
2048
262144 256
3072
393216 384
4096
524288 512
67) Unix
Saving and
Closing
[esc]
:wq!
Save changes
and quit
[esc]
:w!
Save without
quitting
[esc]
:q!
Quit without
saving
[esc]
:w newfile
Save as a
different file name
68)
How this LOGPINNING works ?
Step 1) Check the log utilization first,
using command q log <<
TSM_SERVER>q log
Available
Assigned Maximum Maximum
Page Total Used
Pct Max.
Space Capacity Extension Reduction Size
Usable Pages Util
Pct
(MB)
(MB) (MB) (MB) (bytes) Pages Util
---------
-------- --------- --------- ------- --------- --------- ----- -----
12,288
12,288 0 4,672
4,096 3,145,216 1,948,198
61.9 62.0
Step 2) If the LOG utilization is more than
regular, then check which is pinning the LOG utilization, using command
>> show logpin
TSM_SERVER>sh logpin
Dirty page
Lsn=19212493.185.2168, Last DB backup Lsn=19209505.150.728,
Transaction
table Lsn=19205104.4.2091, Running DB backup Lsn=19205104.4.2091,
Log
truncation Lsn=19205104.4.2091
Lsn=19205104.4.2091,
Owner=DB, Length=56
Type=Update,
Flags=82, Action=SetIcb, Page=10953728, Tsn=0:3958938980,
PrevLsn=0.0.0,
UndoNextLsn=0.0.0, UpdtLsn=0.0.0 ===> Bit Offset = 594
(312713)
Generating SM Context Report:
(312713) *** no sessions found ***
(475)
Generating SM Context Report:
(475) *** no sessions found ***
(312712)
Generating SM Context Report:
(312712)
Session 227317: Type=Node, Id=SAP_HIG
(312712) Platform=TDP R3 AIX, NodeId=760, Owner=
(312712) SessType=4, Index=4, TermReason=0
(312712) RecvWaitTime=0.000 (samples=0)
(312712) Backup
Objects ( bytes ) Inserted: 0 (
0.0 )
(312712) Backup
Objects ( bytes ) Restored: 0 (
0.0 )
(312712) Archive Objects ( bytes ) Inserted: 0 ( 0.0 )
(312712) Archive Objects ( bytes ) Retrieved: 0 ( 0.0
)
(312712) Last Verb ( ConfirmResp ), Last Verb State ( Sent )
Session
227317 is assoicated with this transaction.
The recovery
log is pinned by a data base backup that is currently running.
Step 3) Check the session details, which is
pinning the log.
TSM_SERVER>q sess 227317 f=d
Sess Number:
227,317
Comm. Method:
Tcp/Ip
Sess State: RecvW
Wait Time: 0
S
Bytes Sent:
22.6 K
Bytes Recvd:
185.5 G
Sess Type:
Node
Platform: TDP
R3 AIX
Client Name:
SAP_HIG
Media Access
Status:
User Name:
Date/Time
First Data Sent: 12/26/2008 18:00:39
Proxy By
Storage Agent:
Step 4) From the above OUTPUT, Node SAP_HIG
is started the abckup at 26th December 18:00 hrs, till now, 185.5.GB backup has
completed.
Remeber this
is running in LAN. As per IBM, If the backup data running in LAN is more than
150GB. It should be changed to LANFREE.
Since this
session is running in LAN, It is pinning the recovery log.
Step 5) Cancel the session which is pinning
the LOG.
TSM_SERVER>cancel sess 227317
Cancelling
session 227317.
49) What are all TSM Server parameters help to
increase the server performance?
Rescource
Utilization.
Buffer pool
Size.
Number of
Clients.
Database Size
must be under controlled.
Not to use
Show, Few Select commands.
50) What are all parameters helps to increase
backup performance?
Adapter from
Client side, should have 1GBPS NIC.
Increase
Transaction Byte Limit value in DSM.OPT
If the backup
is going to TAPE, better to use Latest LTO technology to speed up the Backup
performance.
51) What are all actions you will perform to speed up the restoration?
Keep the
Client Data in DISK Storage Pool itself for few days using MIGDELAY value, So
that When ever we restore that data It will be faster since it is in DISK.
Increase
Transaction Byte Limit value in, Mount Points in Client DSM.OPT.
Use
Collocation enabled for the Node.
52) How to check the number of slots in
library?
show slots
libraryname >> will show each and
every information about slots.
Ex: PVR slot
information for library DDSST05.
Library : LIBR3584
Product
Id : 03584L32
Support
module : 4
Mount
count : 3 No of drives Mounted.
Drives : 6 Total
No. of Drives.
Slots : 1063
Changers : 2 >>>>>>>>
It means that GRIPPERS are 2
Import/Exports : 10
Device : /dev/st05_smc101
Drive 0, element 257
Drive 1, element 258
Drive 2, element 259
Drive 3, element 260
Drive 4, element 261
Drive 5, element 262
Changer 0,
element 1
Changer 1,
element 2
Slot 0,
status Cleaner, element number 1025, barcode not present, barcode value
<>,
devT=LTO, mediaT=387, elemT=ANY
Slot 1,
status Cleaner, element number 1026, barcode not present, barcode value
<>,
devT=LTO, mediaT=387, elemT=ANY
Slot 2,
status Cleaner, element number 1027, barcode not present, barcode value
<>,
devT=LTO, mediaT=387, elemT=ANY
53)
How to find and resolve when the drive
is continuously generating errors?
From TSM
Server, We can check the drive errors in activity log using,
q act
se=drivename begind=-1 endd=today
From AIX,
errpt | more
To resolve
the drive issue,
Check the
drive element address, using > q dr libraryname f=d
Also Read: TSM Server Performance Tuning Parameters
Also Read: TSM Server Performance Tuning Parameters
54)
What are the latest features of TSM 5.5?
TSM 5.5
includes integrated key management for encrypted backups, support for VMware's
Consolidated Backup option (VCB),
Snapshot
support for Microsoft applications,
The ability
to do multiple simultaneous restores on sequential disk and the ability to
restart the movement of TSM instances from one server to another.
55)
How to configure LANFREE?
From TSM Server
side, you have to define the server and have to define the paths to all the
drives.
define server
<Servername> hladdress=<Servername> lladdress=<LANFREE
portnumber> serverpassword=<Server Password>
define path
SERVERNAME DriveNAME srctype=server desttype=drive library=<Library Name>
device=/dev/rmt3
From the
Client Side,
Install
Storage Agent Software, ATAPE driver, CFGMGR, and configure dsmstopt and
devconf.file
Then Start
the DSMSTA process,
56)
To check whether all the drives configured properly or not in Storage Agent,
use this command?
lsdev –Cc
tape
57)
To check Whether Storage Agent Process is running or not?
ps –ef | grep
dsmsta
58)
How to check whether drive is configured properly or not?
In AIX, lsdev
–Cc tape
From TSM
Server, q drive libraryname drivename f=d
Here you can
find whether drive is online or not
AIX COMMANDS
lsdev –Cc tape To check the
Configured TAPE drives,
To
check information about Ethernet Adapter 1,
prtconf To find the
complete information about the AIX system.
[Processor,
Memory, Hard Disk]
59) What are the server configuration files? Explain
in detail?
Also Read: How to increase TSM restore performance
Also Read: How to increase TSM restore performance
60) What is Reclamation, Migration? How will you do it
manually?
Reclamation: It is the process moving the active data from fragmented volumes to single or few
no of volumes. It makes the fragmented volumes reusable.
Command: Reclaim stg poolname threshold=number
duration=minutes offsitereclaimimit=no of volumes
Migration: This is used to migrate files from one storage pool to
the next storage pool
Command: Migrate stgpool poolname lowmig=number
duration=minutes reclaim=yes/no.
61) Mention the reasons for migration fail?
Migdelay and vol out of space.
62) Have you ever implemented new TSM server? what is
the process?
63) what is the procedure to take backup from new
Backup/Archive client?
64) How will you do the restore to a client system if
you have access?
Restore path
Restore path –pick(To restore a particular file)
65) What is the maximum size of recovery log?
13 GB
66) What will you do if recovery log reaches 98%?
Issue show logpin command and cancel all the inactive
processes that are pinning the log.
67) Is there any other process other than
show logpin?
68) How many Servers & Clients do you have in your
company?
8 severs,1500 clients.
69) What are your Daily activites?
Health check of
TSM servers.
Checking
status,If any
missed or failed schedules resolving the problem.
70) Mention any other commands other than q db,q log?
Using SELECT commands we can do
71) What are the parameters in copy group?
72) How will you configure schedule in
client?
73) What is command to take DB Backup?
Backup DB devc=deviceclass type=full/incremental/snapshot
74) Do you have idea about Exchange, TDP oracle, TDP
SQL?
Yes I know about TDP SQL
75) How will you take scheduling backup in
TDP SQL?
LIBRARY
94) What type of library model you are
using?
95) How many drives do you have?
96) what is the model of the tape you are using?What
is its size?
LTO 3
Size:400 GB,when compressed 800 GB
97) What will yu do when drives went offfline?
98) Is you library is shared?How you shared it?
YES
Define library library_name library type=
manual/scsi/349x autolabel=yes/no
shared=yes/no
99) Is your library is logically shared or physically
shared?
Logically shared
100) If logically shared is all drives accessible to
all servers?
NO
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