Hi all, thx for your upds. What I have now for BCDS is: ARC0148I BCDS TOTAL SPACE=4680000 K-BYTES, CURRENTLY 341 ARC0148I (CONT.) ABOUT 83% FULL, WARNING THRESHOLD=85%, TOTAL ARC0148I (CONT.) FREESPACE=36%, EA=YES, CANDIDATE VOLUMES=0 ARC0948I BCDS INDEX TOTAL SPACE=126000 K-BYTES, 344 ARC0948I (CONT.) CURRENTLY ABOUT 8% FULL, WARNING THRESHOLD=85%, ARC0948I (CONT.) CANDIDATE VOLUMES=0
BCDS dsn is on a 3390-9 dasd. No other dsns reside on that disc. I still have 3.200 CYls free, I'll redefine it with more space. Many thx, A.Cecilio. On Thu, Jan 17, 2013 at 7:29 PM, O'Brien, David W. (NIH/CIT) [C] < [email protected]> wrote: > Lizette, > > What is the freespace(nn,nn) parameter in your CDS VSAM define? > > I suspect you are running with something like 50,50 based on your comment. > If you are 96% full with 62% freespace that tells me that a section of your > CDS is experiencing a lot of activity and will drive the file to 100%. > Probably at the most inopportune time. > > Splits for a HSM CDS should not be a concern. It's not like anyone is > waiting with bated breath for a migrate or backup to finish. > > Like any other VSAM KSDS, the HSM CDSs need to be re-organized from time > to time. > > Thank You, > Dave O'Brien > NIH Contractor > ________________________________________ > From: Lizette Koehler [[email protected]] > Sent: Thursday, January 17, 2013 9:27 AM > To: [email protected] > Subject: Re: DFHSM CDS size versus multi-cluster > > I think if you issue the command F dfhsm,Q CDS you may find in the ARC0148I > messages that there are two pieces of information to explain if your file > needs to be reorg'd > > First is the number you get is %Full. However there is a second number > %Freespace. > > What I have seen in my shop is we are running 96% full. However we have > 62% > freespace. Which to me does not indicate a need to reorg. > > According to IBM and Share presentations, the xCDS files should not be > reorg'd. That when you reorg an xCDS HSM has to starting splitting the > files again which will slow down the process for a little bit. Once enough > splits occur so there is room to insert records, it is fine. > > So the questions are > 1) Is the xCDS so big it needs a reorg? > 2) Do I need to resize the xCDS dataset? > > Once those are answered, you can figure out when to take an outage on HSM. > > The other option is to change from VSAM to VSAM RLS structure for your xCDS > datasets. You may also wish to review if the Journal dataset should be > changed as well. > > Lizette > > > > -----Original Message----- > > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf > > Of af dc > > Sent: Thursday, January 17, 2013 5:20 AM > > To: [email protected] > > Subject: DFHSM CDS size versus multi-cluster > > > > Hello, > > I'm running z/os V1.12 and I've got my BCDS filled with 85%. It's size is > > 6500 CYLS with no SEC space. > > VSAM characteristics are: > > SHROPTNS(3,3) RECOVERY UNIQUE NOERASE > > UNORDERED TEMP-EXP NOREUSE NONSPANNED > > > > INDEXED NOWRITECHK NOIMBED NOREPLICAT > > EXTENDED EXT-ADDR > > > > In a short time I'll have to create a new BCDS, so, in your opinion > what's > advisable to > > have (performance aspect, backup considerations?, etc)?? > > 1) a bigger BCDS or > > 2) multi cluster > > > > Note: > > - DFHSM cdss are shared among 3 lpars > > > > Any hint is welcome? > > Many thx, Antonio Cecilio. > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, send > email > to > > [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
