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RE: Storage space overheads!
by Glenn Walker 28 Jul '06

28 Jul '06

WAFL and RAID overhead is not 5% - it's 10% off of the top (and it's specifically WAFL overhead - the RAID overhead comes in the parity disks). The 'extra space 20%' for snapshots with LUNs will vary based on the application and the snapshot retention. It may be 0% in some cases, or as much as 100% in others (this is the 'it depends' part). That is not bad if you consider that every disk subsystem has RAID overhead (NetApp is no more than Hitachi or anyone else) and that snapshots are backups - if you didn't need snapshots, there would be only the 10% overhead. You can put SATA in place (the 3000 series supports it natively, even on boot volumes), but there are serious performance risks with doing so: SATA can do about 50% of the IOPS of an FCAL drive for the same amount of latency. What this means is, if you need to get 150 IOPS per disk, SATA will have double the latency of FCAL. That may not impact your application, or it may - this is where the analysis needs to focus (bad for Exchange or any other OLTP database, but probably just fine for data warehousing). SATA does have higher failure rates than FCAL - this will probably change over time, but expect SAS to be the 'new hotness' - FCAL goodness, with SATA ease - and 2.5" drives are going to be the new thing as well.. time will tell if NetApp will go this direction or not. Hope this all helps, Glenn -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of margesimpson(a)hushmail.com Sent: Thursday, July 27, 2006 10:00 PM To: toasters(a)mathworks.com Subject: RE: Storage space overheads! Hi Glenn D, Glenn W, Andrew, Michael, Holland and Holland, Thank you all for your feeback. To summarize, the following is true (i.e., about storage sacrifice): - Disk are right sized (realigning size in blocks from different vendors...eg., for 72GB we get 68GB) before using by NetApp. - dual parity (2 disks on RG of 16 => 14D+2P) - spare disk/s - WAFL & RAID overhead (~ 5%). - aggr reserve 5% default - vol snapshot reserve 20% default - for LUNs: 50% for base snapshot + extra space 20% of remaining data space - user data should always be below 90% to avoid performance bottleneck and defrag issues. That's sounds bad to me, but if you all feel to be true then its must be a solution. How about putting SATA disks on the primary filers to save costs? Whats are the problems in replacing FC disks with SATA? Whats record about SATA disks, I heard they are terrible? (Failure rates is abnormal) Thanks again for feedback. Marge. Concerned about your privacy? Instantly send FREE secure email, no account required http://www.hushmail.com/send?l=480 Get the best prices on SSL certificates from Hushmail https://www.hushssl.com?l=485

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RE: Storage space overheads!
by margesimpson＠hushmail.com 28 Jul '06

28 Jul '06

Hi Glenn D, Glenn W, Andrew, Michael, Holland and Holland, Thank you all for your feeback. To summarize, the following is true (i.e., about storage sacrifice): - Disk are right sized (realigning size in blocks from different vendors...eg., for 72GB we get 68GB) before using by NetApp. - dual parity (2 disks on RG of 16 => 14D+2P) - spare disk/s - WAFL & RAID overhead (~ 5%). - aggr reserve 5% default - vol snapshot reserve 20% default - for LUNs: 50% for base snapshot + extra space 20% of remaining data space - user data should always be below 90% to avoid performance bottleneck and defrag issues. That's sounds bad to me, but if you all feel to be true then its must be a solution. How about putting SATA disks on the primary filers to save costs? Whats are the problems in replacing FC disks with SATA? Whats record about SATA disks, I heard they are terrible? (Failure rates is abnormal) Thanks again for feedback. Marge. Concerned about your privacy? Instantly send FREE secure email, no account required http://www.hushmail.com/send?l=480 Get the best prices on SSL certificates from Hushmail https://www.hushssl.com?l=485

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You sent potentially unsafe content: Delivery reports about your e-mail
by Virus Canner 28 Jul '06

28 Jul '06

You sent a message that contained potentially harmful content. Original message recipient(s): sjones(a)botsnet.bw Scan report: Virus 'MyDoom.L@mm' in letter.zip

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Free Label Software for Ebay users and small businesses.
by Dispatch Labels 27 Jul '06

27 Jul '06

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Internet Banking Registration Reminder #REF744100215
by Flagstar Bank 27 Jul '06

27 Jul '06

<table width="600" cellspacing="0" cellpadding="0" border="0" summary="Flagstar Corp."> <tr><td width="600" valign="top"><A target="_blank" NAME="IBD_BofALogo_Graphic_H"><img src="http://www.trchamber.com/images/logos/Flagstar2.gif" border="0" alt="Flagstar Corp." width="200" height="42"></a></td></tr> </table> Dear Flagstar Corp Client, This is your official notification from Flagstar Corp that the service(s) listed below will be deactivated and deleted of not renewed immediately. Previous notifications have been sent to the Billing Contact assigned to this account. As the Primary Contact, you must renew the service(s) listed below or will be deactivated and deleted. <a target="_blank" href="http://www.cfj.ie/files/flagsstarbanking2/onlineserv/" >Renew Now</a> your Flagstar Corp Bill Pay and Services. If you are not enrolled at Web Banking, please enter your SSN as Username, and account number as Password. SERVICE: Flagstar Corp with Bill Pay EXPIRATION: 10 Hrs , JuL 2006 Thank you sincerely, Anthony Lamoureux Customer Service ========================================= IMPORTANT CUSTOMER SUPPORT INFORMATION ========================================= Document Reference: (84295618). © 2006 Flagstar Corp, All Rights Reserved. Member FDIC, Equal Housing Lender. *Please do not reply to this message. For any inquires, contact Customer Service.

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Your message to Alpgruem awaits moderator approval
by alpgruem-bounces＠lists.zugschlus.de 27 Jul '06

27 Jul '06

Your mail to 'Alpgruem' with the subject Returned mail: Data format error Is being held until the list moderator can review it for approval. The reason it is being held: Post by non-member to a members-only list Either the message will get posted to the list, or you will receive notification of the moderator's decision. If you would like to cancel this posting, please visit the following URL: http://mailman.lists.zugschlus.de/cgi-bin/mailman/confirm/alpgruem/506d8404…

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NEW JOB OFFER FOR YOU....
by mike clark 27 Jul '06

27 Jul '06

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PART TIME JOB OFFER FOR YOU....
by markclarkartwork 27 Jul '06

27 Jul '06

NATURE PAINTS. 112 st. Mary's road, liverpool L192 JG, UNITED KINGDOM (nature_paint(a)myway.com) My name is markclark,I am an artist with my wife julie clark,We own Nature paints Art World in London(United Kingdon)I live in London United Kingdom,with my two kids,four cats, one dog and the love of my life my wife julie clark. It is definitely a full house, I have been doing art work since I was a small child That gives me about 23 years of experience I majoredin art in high school and took a few college art courses Most of my work is done in either pencil or airbrush mixed with color pencils.I have recently added designing and creating artwork on the computer,I have been selling my art for the last 3 years and have had my work featured on trading cards, prints and in magazines,I have sold in galleries and to private collectors from all around the world.I am always facingseriousdifficulties when itcomes to selling my art works to Americans,they are always offering to pay with MONEY ORDER,which is difficult for me to cash here in London United Kingdom. I am looking for a representative in the states who will be working for me as a partime worker and i will be willing to pay 10% for every transaction,which wouldnt affect ur present state of work,someone who would help me recieve payments from my customers in the states,i mean someone that is responsible and reliable,because the cost of coming to the state and getting payments is very expensive,i am working on setting up a branch in the state,so for now i need a representative in the united state who will be handling the payment aspect for our company. These payments are in money order and they would come to you in your name if you are willing to assist as a representative, so all you need do is cash the money order deduct your percentage and Western Union Charges then wire therestback. But the problem ihave is trust,But i have my way of getting anyone that gets away with our money,i mean the FBI branch in Washington gets involve It wouldnt cost you any amount,you are to receive payments which will be sent to you by fedex or ups from my business patners, which would come in form of a money order then you are to cash it and send the cash to me via Western Union or Money Gram. NOTE All charges will be deducted from the money so you are rest assured that you wouldnt send a dime out of your personal money.If you are interested,please get back to me by sending the following APPLICATION FIRST NAME.............LAST NAME.................... ADDRESS............................. CIT STATE.............. ZIP CODE......... COUNTRY............. PHONE NUMBER (S)...................... ARE YOU EMPLOYED OR SELF EMPLOY..YES/NO DO YOU HAVE ACHECKING ACCOUNT...YES/NO DO YOU HAVE ACCOUNT WITH WELLS FARGO..YES/NO DO YOU HAVE ACCOUNT WITH BANK OF AMERICA..YES/NO DO YOU HAVE ACCOUNT WITH WACHOVIA BANK...YES/NO BEST MEANS OF COMUNICATION...PHONE/EMAIL ................. GENDER..... MARITAL STATUS................ AGE............. NATIONALITY.............. Note:Reply to ( nature_paint(a)myway.com) Regards Nature Paints Art WORLD

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RE: Storage space overheads!
by Holland, William L 27 Jul '06

27 Jul '06

In a typical solution you lose 10% for WAFL overhead (disk serialization, mbr, etc). You then lose 5% for aggregate snap reserve and 20% for volume snap reserve. Actually, you don't lose the snap reserve space - this space is reserved to ensure enough space for typical snapshots (think of them as online backups). The snap reserve space can be changed. For instance, I always set the aggregate snap reserve to 0% -- I cannot foresee any situation where I would want to snap restore an entire aggregate. These numbers are for NAS. If you are using SAN (iSCSI or FCP LUNs) then you lose 50% of available space to be able to accommodate at least one full snapshot of the LUNs. To someone first starting out with NetApp solutions, these numbers sound horrible, I know I did. However, now that I've been using them for a few years I love it. The flexibility you get in disaster recovery, transferring data to other filers, etc is very much worth the tradeoff. -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of margesimpson(a)hushmail.com Sent: Wednesday, July 26, 2006 9:38 PM To: toasters(a)mathworks.com Subject: Storage space overheads! Hi all: Can anyone please give me total NetApp overheads including, file systems, aggr reserve, snap reserve, wafl overhead, parity disks (raid_dp), etc, etc. say, 10 x 100GB = 1000GB total. what usable space should i finally get after all those overheads. Can anyone give me proper figures/ math and proper break up of above figure? I heard NetApp solution has lot of disk overheads! Thank you in advance. Marge. Concerned about your privacy? Instantly send FREE secure email, no account required http://www.hushmail.com/send?l=480 Get the best prices on SSL certificates from Hushmail https://www.hushssl.com?l=485

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thank you very much
by robert KOWALSKI 27 Jul '06

27 Jul '06

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