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| 8200 4ports, 2 for RC and 2 for Data https://3parug.com/viewtopic.php?f=18&t=3503 |
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| Author: | Nikolay_K [ Tue Dec 01, 2020 5:04 pm ] |
| Post subject: | 8200 4ports, 2 for RC and 2 for Data |
Hi Team, as FC cards bit expensive, do you think just embedded ports would be enough to link two all flash 8200 - 1 pair for RC, another for Data? ISL 8 gbit, FC fabric 8 gbit but planned to be upgraded to 16 in several months. Planned load - vmware stretched cluster. Current replication bandwidth ~ 100MB\sec but SSD so i cannot use RCIP - due to delays and need to use peer persistance and sync copy. of cource if one FC switch\fabric fails - we will have array connected by only 1 port to vmware hosts. So much bad? |
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| Author: | MammaGutt [ Wed Dec 02, 2020 10:27 am ] |
| Post subject: | Re: 8200 4ports, 2 for RC and 2 for Data |
You will lose persistent port If you lose one node, you lose one fabric. If you lose one fabric, you'll lose the performance of one node. If you lose a single SFP or get into issue with a single port on FC switch or 3PAR it will impact an entire fabric. It will limit troubleshooting as you have multiple components as your only path in a fabric. The FC HBA is an expensive 4port FC HBA, but in your entire storage environment it is a very small part of the total cost. Not really where I would start if I were to save money. An to be honest, you are probably better off with a single fabric with 2 connections, but it isn't a good option either. |
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| Author: | kolin [ Wed Dec 02, 2020 11:35 am ] |
| Post subject: | Re: 8200 4ports, 2 for RC and 2 for Data |
Thank you, looks like no way ) Rcip not an option? |
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| Author: | Richard Siemers [ Fri Dec 18, 2020 1:55 am ] |
| Post subject: | Re: 8200 4ports, 2 for RC and 2 for Data |
It depends... RCIP is supported, but there are limitations on latency between the arrays... I am concerned that you only have a 100mbit link, so alot depends on your workload... Its counter-productive to have nice all-flash arrays with sync-replication over a slow line. Your disk IO latency will be impacted by your 100mbit link latency. If it's lab/test gear, try it. For real business use, plan some upgrades or shift to using async replication for a DR strategy. |
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