Join IIUG
 for   
 

Informix News
18 Nov 13 - ZDNet - Top 20 mobile skills in demand... Read
09 Sep 13 - telecompaper - Shaspa and Tatung have shown a new smart home platform at Ifa in Berlin. Powered by the IBM Informix software... Read
06 Sep 13 - IBM data magazine - Mission Accomplished - Miami, Florida will be the backdrop for the 2014 IIUG Informix Conference... Read
01 Feb 13 - IBM Data Magazine - Are your database backups safe? Lester Knutsen (IBM Champion) writes about database back up safety using "archecker"... Read
14 Nov 12 - IBM - IBM's Big Data For Smart Grid Goes Live In Texas... Read
3 Oct 12 - The Financial - IBM and TransWorks Collaborate to Help Louisiana-Pacific Corporation Achieve Supply Chain Efficiency... Read
28 Aug 12 - techCLOUD9 - Splunk kicks up a SaaS Storm... Read
10 Aug 12 - businessCLOUD9 - Is this the other half of Cloud monitoring?... Read
3 Aug 12 - IBM data management - Supercharging the data warehouse while keeping costs down IBM Informix Warehouse Accelerator (IWA) delivers superior performance for in-memory analytics processing... Read
2 Aug 12 - channelbiz - Oninit Group launches Pay Per Pulse cloud-based service... Read
28 May 12 - Bloor - David Norfolk on the recent Informix benchmark "pretty impressive results"... Read
23 May 12 - DBTA - Informix Genero: A Way to Modernize Informix 4GL Applications... Read
9 Apr 12 - Mastering Data Management - Upping the Informix Ante: Advanced Data Tools... Read
22 Mar 12 - developerWorks - Optimizing Informix database access... Read
14 Mar 12 - BernieSpang.com - International Informix User Group set to meet in San Diego... Read
1 Mar 12 - IBM Data Management - IIUG Heads West for 2012 - Get ready for sun and sand in San Diego... Read
1 Mar 12 - IBM Data Management - Running Informix on Solid-State Drives.Speed Up Database Access... Read
26 Feb 12 - BernieSpan.com - Better results, lower cost for a broad set of new IBM clients and partners... Read
24 Feb 12 - developerWorks - Informix Warehouse Accelerator: Continuous Acceleration during Data Refresh... Read
6 Feb 12 - PRLOG - Informix port delivers unlimited database scalability for popular SaaS application ... Read
2 Feb 12 - developerWorks - Loading data with the IBM Informix TimeSeries Plug-in for Data Studio... Read
1 Feb 12 - developerWorks - 100 Tech Tips, #47: Log-in to Fix Central... Read
13 Jan 12 - MC Press online - Informix Dynamic Server Entices New Users with Free Production Edition ... Read
11 Jan 12 - Computerworld - Ecologic Analytics and Landis+Gyr -- Suitors Decide to Tie the Knot... Read
9 Jan 12 - planetIDS.com - DNS impact on Informix / Impacto do DNS no Informix... Read
8 Sep 11 - TMCnet.com - IBM Offers Database Solution to Enable Smart Meter Data Capture... Read
1 Aug 11 - IBM Data Management Magazine - IIUG user view: Happy 10th anniversary to IBM and Informix... Read
8 Jul 11 - Database Trends and Applications - Managing Time Series Data with Informix... Read
31 May 11 - Smart Grid - The meter data management pitfall utilities are overlooking... Read
27 May 11 - IBM Data Management Magazine - IIUG user view: Big data, big time ( Series data, warehouse acceleration, and 4GLs )... Read
16 May 11 - Business Wire - HiT Software Announces DBMoto for Enterprise Integration, Adds Informix. Log-based Change Data Capture... Read
21 Mar 11 - Yahoo! Finance - IBM and Cable&Wireless Worldwide Announce UK Smart Energy Cloud... Read
14 Mar 11 - MarketWatch - Fuzzy Logix and IBM Unveil In-Database Analytics for IBM Informix... Read
11 Mar 11 - InvestorPlace - It's Time to Give IBM Props: How many tech stocks are up 53% since the dot-com boom?... Read
9 Mar 11 - DBTA - Database Administration and the Goal of Diminishing Downtime... Read
2 Feb 11 - DBTAs - Informix 11.7 Flexible Grid Provides a Different Way of Looking at Database Servers... Read
27 Jan 11 - exactsolutions - Exact to Add Informix Support to Database Replay, SQL Monitoring Solutions... Read
25 Jan 11 - PR Newswire - Bank of China in the UK Works With IBM to Become a Smarter, Greener Bank... Read
12 Oct 10 - Database Trends and Applications - Informix 11.7: The Beginning of the Next Decade of IBM Informix... Read
20 Sep 10 - planetIDS.com - ITG analyst paper: Cost/Benefit case for IBM Informix as compared to Microsoft SQL Server... Read
20 Jul 10 - IBM Announcements - IBM Informix Choice Edition V11.50 helps deploy low-cost scalable and reliable solutions for Apple Macintosh and Microsoft Windows... Read
20 Jul 10 - IBM Announcements - Software withdrawal: Elite Support for Informix Ultimate-C Edition... Read
24 May 10 - eWeek Europe - IBM Supplies Database Tech For EU Smart Grid... Read
23 May 10 - SiliconIndia - IBM's smart metering system allows wise use of energy... Read
21 May 10 - CNET - IBM to help people monitor energy use... Read
20 May 10 - ebiz - IBM Teams With Hildebrand To Bring Smart Metering To Homes Across Britain... Read
19 May 10 - The New Blog Times - Misurare il consumo energetico: DEHEMS è pronto... Read
19 May 10 - ZDNet - IBM software in your home? Pact enables five-city smart meter pilot in Europe... Read
17 March 10 - ZDNet (blog) David Morgenstern - TCO: New research finds Macs in the enterprise easier, cheaper to manage than... Read
17 March 2010 - Virtualization Review - ...key components of Big Blue's platform to the commercial cloud such as its WebSphere suite of application ser vers and its DB2 and Informix databases... Read
10 February 2010 - The Wall Street Journal - International Business Machines is expanding an initiative to win over students and professors on its products. How do they lure the college crowd?... Read


End of Support Dates

IIUG on Facebook IIUG on Twitter

[ View Thread ] [ Post Response ] [ Return to Index ] [ Read Prev Msg ] [ Read Next Msg ]

IDS Forum

Re: Disk setup

Posted By: Informix DBA
Date: Friday, 18 October 2013, at 10:56 a.m.

In Response To: Re: Disk setup (Art Kagel)

Art,

Thank you for the detailed information and thank you for your continued
support to this community.

Have a great day,

--David

On Fri, Oct 18, 2013 at 9:50 AM, Art Kagel <art.kagel@gmail.com> wrote:

> The default page size on all platforms except Windows, AIX, and MacOSx is
> 2K (4K on those platforms). However, since version 10.00 any dbspace
> except the rootdb dbspace and those holding logical or physical logs can be
> any multiple of the default page size for the platform up to 16K. Informix
> typically writes either a single page or up to 8 pages in a single IO, so
> depending on the dbspace's page size, on Solaris, that would be from 2K to
> 128K. If all of your dbspaces use 2K pages, then a block size of 32K works
> very well and performance seems to start dropping off above 128K. Chunks
> in dbspaces that use 16K pages, however, might do just as well with block
> sizes from 256K to 1MB. But with a finite number of spindles, you may not
> be able to build multiple RAID10 arrays with different block sizes for
> different dbspaces. Like everything else we do as DBAs, this is a bunch of
> tradeoffs.
>
> The thing to remember is that the RAID subsystem can only write a complete
> stripe block to any drive, so even a 2K write must write out the entire
> block (though not the entire stripe). Multiple contiguous writes from
> Informix closely spaced in time can be coalesced by the system into a
> single write, that's not guaranteed and unless you are in the midst of a
> bulk load or during checkpoint chunk writes just doesn't happen very often.
> LRU writes by the engine look mostly random to the RAID subsystem and
> occur in fits and spurts so far less coalescing happens, so if the stripe
> blocks are too big, you end up rewriting each block many times. We seek a
> Zen-like balance. ;-)
>
> Art
>
> Art S. Kagel, Principal Consultant
>
> Advanced DataTools (www.advancedatatools.com)
> Blog: http://informix-myview.blogspot.com/
>
> Disclaimer: Please keep in mind that my own opinions are my own opinions
> and do not reflect on my employer, Advanced DataTools, the IIUG, nor any
> other organization with which I am associated either explicitly,
> implicitly, or by inference. Neither do those opinions reflect those of
> other individuals affiliated with any entity with which I am affiliated nor
> those of the entities themselves.
>
> On Fri, Oct 18, 2013 at 9:11 AM, Informix DBA <in4mixdba@gmail.com> wrote:
>
> > Do you know what block size informix uses on Solaris 11? Currently
> > running 11.70.FC7W2.
> >
> > --David
> > in4mixdba
> >
> > On Thu, Oct 17, 2013 at 11:45 PM, Art Kagel <art.kagel@gmail.com> wrote:
> >
> > > RAID10! Small stripe block sizes (32K to 1MB at most). SAN techs love
> to
> > > configure arrays with huge block sizes from 256MB to 1GB which works
> well
> > > for filesystems but is VERY VERY BAD for databases.
> > >
> > > Build multiple arrays of mirrored pairs so that you can isolate hot
> > tables
> > > and indexes from each other and from the logical and physical logs.
> > > Ideally, if your logical log and physical log volume is below the
> > > bandwidth available from a single drive then make a singleton RAID1
> > > mirrored pair for the logs alone (or one for each logical and physical
> > logs
> > > if you need a bit more bandwidth) to keep the logs completely
> independent
> > > of your mainline data and gather the remaining disks into a single big
> > > RAID10 for your data and indexes.
> > >
> > > More spindles is better than fewer. If you can get more drives, double
> > the
> > > number and create the VG's for the database to use only the middle
> 30-50%
> > > of the disk (ie not the outer or inner cylinders) and either leave the
> > rest
> > > of the drive's space unused or allocated to dbspaces for very low
> access
> > > rate tables like historical or archival data tables.
> > >
> > > If space is tight, then build the biggest widest RAID10 array you can
> to
> > > spread the IOs out.
> > >
> > > NO RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO
> > > RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO
> > > RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO
> > > RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO
> > > RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!! NO RAID5!!!
> > >
> > > RAID5 is not a safe place for your data! Period!
> > >
> > > See my presentation from the 2012 IIUG Conference entitled "Doing
> Storage
> > > Right!" for details on why and the latest research on the subject. Also
> > > look for my RAID5 Rant on the BAARF website (www.baarf.com) in the
> left
> > > margin of the main page for a more complete explanation of why NO
> > RAID5!!!
> > >
> > > Art
> > >
> > > Art S. Kagel, Principal Consultant
> > >
> > > Advanced DataTools (www.advancedatatools.com)
> > > Blog: http://informix-myview.blogspot.com/
> > >
> > > Disclaimer: Please keep in mind that my own opinions are my own
> opinions
> > > and do not reflect on my employer, Advanced DataTools, the IIUG, nor
> any
> > > other organization with which I am associated either explicitly,
> > > implicitly, or by inference. Neither do those opinions reflect those of
> > > other individuals affiliated with any entity with which I am affiliated
> > nor
> > > those of the entities themselves.
> > >
> > > On Thu, Oct 17, 2013 at 10:51 PM, LARRY SORENSEN <lsorensen25@msn.com
> > > >wrote:
> > >
> > > > Solaris 10
> > > > IDS 11.5.FC7 - Growth
> > > >
> > > > I remember similar questions being asked in the past, but I can't
> > > remember
> > > > what the concenseous was. I am being given a cabinet with 12-146GB
> > disks
> > > > to be
> > > > used as raw storage for a database. The SA is asking how I want it
> > > > presented....RAID 0, RAID 5...etc. What is the best option.
> > > >
> > > > Thanks
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
> *******************************************************************************
> > > > Forum Note: Use "Reply" to post a response in the discussion forum.
> > > >
> > > >
> > >
> > > --001a11c233ea8d346304e8fbc410
> > >
> > >
> > >
> > >
> >
> >
>
> *******************************************************************************
> > > Forum Note: Use "Reply" to post a response in the discussion forum.
> > >
> > >
> >
> > --001a11c34f5c1cf7ca04e903aa8e
> >
> >
> >
> >
>
> *******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> >
>
> --089e013d1866e05bb404e904358f
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--001a11c3675eae821504e9052202

Messages In This Thread

  • RE: Disk setup
    LARRY SORENSEN -- Thursday, 17 October 2013, at 10:51 p.m.
    • Re: Disk setup
      Art Kagel -- Thursday, 17 October 2013, at 11:45 p.m.
      • Re: Disk setup
        Informix DBA -- Friday, 18 October 2013, at 9:11 a.m.
        • Re: Disk setup
          Art Kagel -- Friday, 18 October 2013, at 9:50 a.m.
          • Re: Disk setup
            Informix DBA -- Friday, 18 October 2013, at 10:56 a.m.
            • RE: Disk setup
              LARRY SORENSEN -- Friday, 18 October 2013, at 1:57 p.m.
          • RE: Disk setup
            LARRY SORENSEN -- Tuesday, 29 October 2013, at 2:15 p.m.
          • RE: Disk setup
            LARRY SORENSEN -- Tuesday, 29 October 2013, at 2:47 p.m.

[ View Thread ] [ Post Response ] [ Return to Index ] [ Read Prev Msg ] [ Read Next Msg ]

IDS Forum is maintained by Administrator with WebBBS 5.12.