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#1
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Experiences with SANRAD?
I'm considering SANRAD iSCSI/SCSI. Does it make sense to get a SAN with SCSI output, and a couple of SANRADs, as opposed to a SAN with iSCSI output? I like the SANRAD solution because of the flexibility (ie. I can get a SCSI SAN today, and then add the iSCSI tomorrow, I can plug my other SCSI disks into the SANRAD over time, etc.). But I wonder if having an additional unit will increase latency. So...anyone with SANRAD experiences to share? - Andrew |
#2
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HVB wrote:
Why do you want iSCSI in the first place? [...] If you want to share your storage with several servers, or if the server(s) is/are further away (12m+) you might want Fibre Channel or iSCSI. Storage will be shared. Initially, it'll be with three servers, but I plan to grow it beyond that. [Separate from this discussion, I've been looking at GFS as a cluster file system for sharing file-level storage.] If you want very high performance between server and storage, then you need Fibre Channel. I see iSCSI as being a great way to connect servers into a centralized storage device that you might not otherwise have bothered connected - usually for cost reasons or if the server is located across an IP WAN. Many people are using iSCSI today for critical servers (Exchange, typically) but I'm not totally convinced that this is a great idea yet. If you are serious about using iSCSI on important servers you should consider using iSCSI HBAs or ToE cards to relieve the server from the encapsulation workload. Hmm. That's a very good point; I'd not considered special iSCSI HBAs. I didn't even realize these existed! As to iSCSI vs. Fibre, I've been thinking that iSCSI is more likely to be successful in the long term. iSCSI doesn't require additional training, as it uses the same ol' boring networking gear. And with ethernet speeds growing as they have been, I think that it'll overtake Fibre's performance ultimately. But I'm new to this market, so take all that with a serious grain of salt. I haven't used the SANRAD v-switches though I haven't used them personally. They offer quite a neat approach to storage virtualisation and the ability to connect SCSI devices into a Fibre Channel SAN. They're pretty good value too, IIRC. They look like a very good way to shift existing storage into a new storage network. But what I'm wondering is if they make sense for a new installation. That is, since I'm buying a new storage device, shouldn't I simply buy a device that speaks iSCSI instead of one that speaks SCSI plus a couple of SANRADs? - andrew |
#3
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On 2004-12-21, Andrew Gideon wrote:
As to iSCSI vs. Fibre, I've been thinking that iSCSI is more likely to be successful in the long term. We will have both for a long time. For the foreseeable future fibre channel will be much faster than iSCSI. With 4 and 8Gb fibre channel being seen while iscsi will be stuck at 1gigethernet. iSCSI doesn't require additional training, as it uses the same ol' boring networking gear. BAH! thats the "physical" layer only, which is like 1/10th of what managing storage is about. There is still the same issues with array management, lun masking, etc.. I see this as a marketing fallocy myself. And with ethernet speeds growing as they have been, I think that it'll overtake Fibre's performance ultimately. Actually not. Ethernet is either 1Gb(today) or 10Gb(so expensive I have never seen it used). Fibre channel has 2Gb as the "normal" and will be 4Gb next year, and 8Gb prob by the end of the year all on the same cables and connectors and backwards compatbile. Plus, 1Gb ethernet is like .5Gb fibre channel due to the overhead of iscsi and the fact ethernet has much smaller packet sizes. (eg more ack's are send back and forth wasting traffic capacity). I am using both FC and iSCSI in our large environment, but frankly people who smoke the iSCSI-will-take-over pipe are not living in reality. |
#4
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in this classic southern delicacy.
The sandwich originated in New Orleans, where an abundance of abortion clinics thrive and hot French bread is always available. 2 cleaned fetuses, head on 2 eggs 1 tablespoon yellow mustard 1 cup seasoned flour oil enough for deep frying 1 loaf French bread Lettuce tomatoes mayonnaise, etc. Marinate the fetuses in the egg-mustard mixture. Dredge thoroughly in flour. Fry at 375° until crispy golden brown. Remove and place on paper towels. Holiday Youngster One can easily adapt this recipe to ham, though as presented, it violates no religious taboos against swine. 1 large toddler or small child, cleaned and de-headed Kentucky Bourbon Sauce (see index) 1 large can pineapple slices Whole cloves Place him (or ham) or her in a large glass baking dish, buttocks up. Tie with butcher string around and across so that he looks like he?s crawling. Glaze, then arrange pineapples and secure with cloves. Bake uncovered in 350° oven till thermometer reaches 160°. Cajun Babies Just like crabs or crawfish, babies are boiled alive! You don?t need silverware, the hot spicy meat comes off in your hands. 6 live babies 1 lb. smoked sausage 4 lemons whole garlic 2 lb. new potatoes 4 ears corn 1 box salt crab boil Bring 3 gallons of water to a |
#5
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onions
6 cloves garlic bunch green onions, chopped Cut the children?s butts and the beef roast into pieces that will fit in the grinder. Run the meat through using a 3/16 grinding plate. Add garlic, onions and seasoning then mix well. Add just enough water for a smooth consistency, then mix again. Form the sausage mixture into patties or stuff into natural casings. Stillborn Stew By definition, this meat cannot be had altogether fresh, but have the lifeless unfortunate available immediately after delivery, or use high quality beef or pork roasts (it is cheaper and better to cut up a whole roast than to buy stew meat). 1 stillbirth, de-boned and cubed ¼ cup vegetable oil 2 large onions bell pepper celery garlic ½ cup red wine 3 Irish potatoes 2 large carrots This is a simple classic stew that makes natural gravy, thus it does not have to be thickened. Brown the meat quickly in very hot oil, remove and set aside. Brown the onions, celery, pepper and garlic. De-glaze with wine, return meat to the pan and season well. Stew on low f |
#7
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Andy wrote:
I think that if you have an existing FC SAN that the SANRAD would be a good, but expensive, way of delivering some portion of it's storage over your existing IP infrastructure since SANRAS's a good product & it works DataCore or FalconStor are also possibilities if you are looking for an FC-iSCSI gateway. -- Nik Simpson |
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