Count number of disk accesses

Hi,
I'm facing a problem while coding some stuff for my thesis. I need to count the number of disk accesses. I know there's clock_t to do that in C++, but I cant seem to find any equivalent in Java. Can someone please help me in this matter? Thank you very much.

You can't do that in pure java. So if you really wantd it, you would need to learn JNI.Even then: most disc drivers use caching (read ahead) and most OSes
try to be smart too when it comes to raw disc access. Without any
kernel access it can't be done.
OTOH, most disc drivers keep some form of statistics that can be
queried.
kind regards,
Jos

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Document Directory 'Number of Times Accessed' count

Not really an api question, but i couldnt find anything else that matched better...
Is the process that updates the Number of Times Accessed count a batch process and if so, how often does it run?
The reason i ask is that i have some docs in my directory whose count is remaining zero, even after I have accessed them, whilst others whose count is increasing over time quite happily.
Does anyone have any ideas why this might be the case?
thans

No, I think what's going on is that rather than update the counter every time a user clicks through, we use a randomized algorithm where there's a 1 in N chance that the portal will add N to the count. For example if N is 5 and you open a document 5 times you would expect to see the counter behave something like: 0 0 0 5 5
This means there's a margin of error (think opinion polls) but the margin decreases as the count increases, so you might know a given document has been accessed 12,450 times with a 5% margin of error. The benefit is that we reduce the load on the database for this particular SQL update by a factor of N. I believe there's a setting somewhere to modify N if you need more accuracte counts, in fact you can set it to 1 if you need a precise count.

Disk Access Failed while Installing Solaris Container.

I have setup 5 guest domains together with the Control Domain.
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Any idea?

I am not sure if multiple virtual disk servers are officially supported under current LDoms release.
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What is a best practice for counting number of payments in Payroll Run?

I'm trying to get a feel for what people are using as a means for counting number of payments being created during a payroll run. I would like to get a total number of checks, direct deposits, wires and zero net checks. My initial thought is to use the Pre-DME number "Selected and Evaluated Persons". This number seems to always match the number of persons "Selected" and "Evaluated" in posting to FI/CO.
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I would appreciate your insight and thoughts on this topic.
Thanks!

Hello Jennie,
This is what we do every payroll:
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Bad number in disk label?

I am attempting to install Sol.8 on a sparc 10. when I attempt to boot from the cdrom I receive this error:" Bad magic number in disk label
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Hemant
http://www.adminschoice.com

Need to re-install CS5.5 on my new hard drive. Serial number from disk package not working.

I need to re-install CS5.5 on my new hard drive. Serial number from disk package not working.

if there's a problem with the number of installations, you'll see a message about an excess activation problem.
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Firefox is using large amounts of CPU time and disk access, and I need to know how to shut down most of this so I can actually use the browser.

Firefox is a very busy piece of software. It's using large amounts of CPU time and disk access. It puts my usage at low priority, so I have to wait for some time to be able to use my pointer or keyboard. I don't know what it uses all that CPU and disk access time for, but it's of no use to me. It often takes off with massive use of resources when I'm not doing anything, and I may not have use of my pointer for several minutes. How can I shut down most of this so I can use the browser to get my work done. I just want to use the web site access part of the software, and drop all the extra. I don't want Firefox to be able to recover after a crash. I just want to browse with a minimum of interference from Firefox. I would think that this is the most commonly asked question.

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* https://support.mozilla.com/en-US/kb/Firefox%20consumes%20a%20lot%20of%20CPU%20resources
High memory usage
* https://support.mozilla.com/en-US/kb/High%20memory%20usage
Check and tell if its working.

Time Capsule disk access SLOW! 2TB - Dual band

I have a Time Capsule (2TB, Dual Band, Firmare at 7.4.2)
Its been working like a dream, backing up 3 Macs for the last 8 months.
I also use it for connecting two or three other disks via USB and then making those accessible over the LAN, and there is also about 100GB of data on the Time capsule disk itself that i use as a dump for files so i can get to them from anywhere on my LAN.
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for example, copying over a 2Mb photo can take minutes when it should take seconds.
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i know it isn't just hanging on the Mac (10.6.4) because deleting the other two images also took a long time (but not this long!)
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to put some context into this, I copied over 1.8Gb today and it took about 4 hours...
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any ideas ?
thanks
Adam

if anyone ever has this issue ....
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Error "NOTICE: [0] disk access failed" during guest domain network booting

Hi,
Could you please tell me what is the problem with my configuration?
I created guest domain on my T1000 server.
As a disk I used disk from disk array: /dev/dsk/c0t18d0
I added disk using commands:
# ldm add-vdsdev /dev/dsk/c0t18d0 vol1@primary-vds0
# ldm add-vdisk vdisk1 vol1@primary-vds0 myldom1
# ldm set-variable auto-boot\?=false myldom1
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{0} ok boot net - install
Boot device: /virtual-devices@100/channel-devices@200/network@0 File and args: - install
Requesting Internet Address for 0:14:4f:f9:78:19
SunOS Release 5.10 Version Generic_137137-09 64-bit
Copyright 1983-2008 Sun Microsystems, Inc. All rights reserved.
Use is subject to license terms.
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NOTICE: [0] disk access failed.
Checking rules.ok file...
Using begin script: install_begin
Using finish script: patch_finish
Executing SolStart preinstall phase...
Executing begin script "install_begin"...
Begin script install_begin execution completed.
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- Check to make sure disks are cabled and powered up
Solaris installation program exited.
Configuration:
[root@gt1000a /]# ldm list-bindings
NAME STATE FLAGS CONS VCPU MEMORY UTIL UPTIME
primary active -n-cv- SP 4 2G 0.5% 2h 23m
MAC
00:14:4f:9f:71:4e
HOSTID
0x849f714e
VCPU
VID PID UTIL STRAND
0 0 5.3% 100%
1 1 0.5% 100%
2 2 0.5% 100%
3 3 0.4% 100%
MAU
ID CPUSET
0 (0, 1, 2, 3)
MEMORY
RA PA SIZE
0x8000000 0x8000000 2G
VARIABLES
keyboard-layout=US-English
IO
DEVICE PSEUDONYM OPTIONS
pci@780 bus_a
pci@7c0 bus_b
VCC
NAME PORT-RANGE
primary-vcc0 5000-5100
CLIENT PORT
myldom1@primary-vcc0 5000
VSW
NAME MAC NET-DEV DEVICE DEFAULT-VLAN-ID PVID VID MODE
primary-vsw0 00:14:4f:fa:ca:94 bge0 switch@0 1 1
PEER MAC PVID VID
vnet0@myldom1 00:14:4f:f9:78:19 1
VDS
NAME VOLUME OPTIONS MPGROUP DEVICE
primary-vds0 vol1 /dev/dsk/c0t18d0
CLIENT VOLUME
vdisk1@myldom1 vol1
VCONS
NAME SERVICE PORT
SP
NAME STATE FLAGS CONS VCPU MEMORY UTIL UPTIME
myldom1 active -n---- 5000 12 2G 0.1% 2h 18m
MAC
00:14:4f:f9:e7:ae
HOSTID
0x84f9e7ae
VCPU
VID PID UTIL STRAND
0 4 0.5% 100%
1 5 0.0% 100%
2 6 0.0% 100%
3 7 0.0% 100%
4 8 0.0% 100%
5 9 0.0% 100%
6 10 0.0% 100%
7 11 0.0% 100%
8 12 0.0% 100%
9 13 0.0% 100%
10 14 0.0% 100%
11 15 0.0% 100%
MEMORY
RA PA SIZE
0x8000000 0x88000000 2G
VARIABLES
auto-boot?=false
boot-device=/virtual-devices@100/channel-devices@200/disk@0
NETWORK
NAME SERVICE DEVICE MAC MODE PVID VID
vnet0 primary-vsw0@primary network@0 00:14:4f:f9:78:19 1
PEER MAC MODE PVID VID
primary-vsw0@primary 00:14:4f:fa:ca:94 1
DISK
NAME VOLUME TOUT DEVICE SERVER MPGROUP
vdisk1 vol1@primary-vds0 disk@0 primary
VCONS
NAME SERVICE PORT
myldom1 primary-vcc0@primary 5000
[root@gt1000a /]#
Kind regards,
Daniel

Issue solved.
There was a wrong disk name:
primary-vds0 vol1 /dev/dsk/c0t18d0
I changed to c0t18d0s2 and now I sucessfuly installed OS from Jumpstart.

How to count number of sales orders generated in a month in SAP SD

Hi SD Gurus,
I have a very strange query from client. I have to count the number of sales order created in a month for a z report. For example 30 in Jan, 25 in Feb etc. Could anyone suggest me How to count number of sales orders generated in a month in SAP SD.
Regards
Vinod Kumar

Hi,
Goto the T.Code "SE16" or "SE16n" or "SE11".
Enter the table name as VBAK
Enter the created on date as the starting date of the period and to date as the end date.
Enter.
Click on "Number of Entries".It will tell you the number of entries created in a particular period.
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Regards,
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How to Count Number of completed line items in past 6 months / 12 months ?

How to Count Number of completed line items in past 6 months / 12 months ?
Hi,
I am trying to count "Number of Completed Line Items in Purchase Order Document" for my Key Figure ZPO_CNT.
Purchase Order document = ZEBELN
Line Item = ZEBELP.
I need to find and count if the Line Item has been received in the past 6 months from today and similarly in the past 12 months.
I have "Delivery Completed" field, ELIKZ.
So, based on this would I be able to calculate it in Query Designer?
If so, Please let me know how

Hello Deva
If youe want to calculate the completed line item for last 6 or 12 month then i think u will be displaying the query data for these montrhs...create a customer exit to give you date range and restric it in filter area....
Now Choose any of the below option
1. I would suggest to implement an additional key figure "counter" in cube and fill values with one for which delivery is completed.
Now use calculated key figure in Query Designer based on logic
IF counter = 1 THEN counter ELSE 0
OR
2. create a formula variable based on ELIKZ and use replacement path variable, it will display you no. of docs for which delivery is completed....
Award points if it solves your problem
Revert back in case of further assistance...
Thanks
Tripple k

How to Count number of words in a file....

Hi Experts,
I have uploaded the text file, from the application server, like this:
call function 'GUI_UPLOAD'
exporting
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tables
    data_tab = LT_FILETABLE.
The text file contains some number character words.... like "sap labs india..... "
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Hi,
Special Characters in Regular Expressions
The following tables summarize the special characters in regular expressions:
Escape character
Special character Meaning
Escape character for special characters
Special character for single character strings
Special character Meaning
. Placeholder for any single character
C Placeholder for any single character
d Placeholder for any single digit
D Placeholder for any character other than a digit
l Placeholder for any lower-case letter
L Placeholder for any character other than a lower-case letter
s Placeholder for a blank character
S Placeholder for any character other than a blank character
u Placeholder for any upper-case letter
U Placeholder for any character other than an upper-case letter
w Placeholder for any alphanumeric character including _
W Placeholder for any non-alphanumeric character except for _
[ ] Definition of a value set for single characters
[^ ] Negation of a value set for single characters
[ - ] Definition of a range in a value set for single characters
[ [:alnum:] ] Description of all alphanumeric characters in a value set
[ [:alpha:] ] Description of all letters in a value set
[ [:blank:] ] Description for blank characters and horizontal tabulators in a value set
[ [:cntrl:] ] Description of all control characters in a value set
[ [:digit:] ] Description of all digits in a value set
[ [:graph:] ] Description of all graphic special characters in a value set
[ [:lower:] ] Description of all lower-case letters in a value set
[ [:print:] ] Description of all displayable characters in a value set
[ [:punct:] ] Description of all punctuation characters in a value set
[ [:space:] ] Description of all blank characters, tabulators, and carriage feeds in a value set
[ [:unicode:] ] Description of all Unicode characters in a value set with a code larger than 255
[ [:upper:] ] Description of all upper-case letters in a value set
[ [:word:] ] Description of all alphanumeric characters in a value set, including _
[ [:xdigit:] ] Description of all hexadecimal digits in a value set
a f
      v Diverse platform-specific control characters
[..] Reserved for later enhancements
[==] Reserved for later enhancements
u2192 More
Special characters for character string patterns
Special character Meaning
Concatenation of n single characters
{n,m} Concatenation of at least n and a maximum of m single characters
{n,m}? Reserved for later enhancements
? One or no single characters
Concatenation of any number of single characters including 'no characters'
*? Reserved for later enhancements
+ Concatenation of any number of single characters excluding 'no characters'
+? Reserved for later enhancements
| Linking of two alternative expressions
( ) Definition of subgroups with registration
(?: ) Definition of subgroups without registration
1, 2, 3 ... Placeholder for the register of subgroups
Q ... E Definition of a string of literal characters
(? ... ) Reserved for later enhancements
for more details please refer the following,
[http://help.sap.com/abapdocu_70/en/ABENREGEX_SYNTAX_SIGNS.htm]
[http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/902ce392-dfce-2d10-4ba9-b4f777843182?QuickLink=index&overridelayout=true]
Thanks,
Renuka S.

How to count number of edges using PXIe-6363 Counters

Hello,
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Thanks
Jeet
Solved!
Go to Solution.

Hi Jeet,
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National Instruments
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How to count number of raw & put result top of page?

I try to count number of table raw it work fine but when I wont to put result top of page it dose not work
only count one table raw
REPORT ZTEST.
DATA: it_sflight TYPE TABLE OF Sflight WITH HEADER LINE .
DATA counter TYPE i VALUE 0.
start-of-SELECTION.
SELECT-OPTIONS: carID for it_sflight-carrid.
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loop at it_sflight .
counter = counter + 1 .
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ULINE.
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TOP-OF-PAGE .
*START-OF-SELECTION.
WRITE: 'Total Rows : ', counter.
ULINE.
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how can I solve this problem ?

Hi
Instead of using counter in a loop use describe statement.
Describe it_sflight.
the no of rows will get populated in the system variable sy-tfill.
DATA: it_sflight TYPE TABLE OF Sflight WITH HEADER LINE .
DATA counter TYPE i VALUE 0.
start-of-SELECTION.
SELECT-OPTIONS: carID for it_sflight-carrid.
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WHERE carrid IN carID and connID IN connid.
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loop at it_sflight .
counter = counter + 1 .
write: /5 it_sflight-carrid,sy-vline,
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              45 it_sflight-fldate,sy-vline,
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end-of-SELECTION.
TOP-OF-PAGE .
*START-OF-SELECTION.
WRITE: 'Total Rows : ', sy-tfill.
ULINE.
WRITE: /5 'Carrid',sy-vline,
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ULINE.
Thanks
Rahul jain
Edited by: Rahuljn on Feb 2, 2011 10:58 AM

How to count number of ones in table

Hello,
i created one table 16x32 each cell is updating 1 byte of data,how to count number of one in all cell,and is it right way to calculate check sum??
thank you

The simplest way is to call GetTableCellRangeValues with VAL_ENTIRE_TABLE as the range, next summing array elements.
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Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

Count number of disk accesses

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