Обсуждение: hardware for PostgreSQL
Hello, I am new to setting up PostgreSQL machines for our operational environments and would appreciate if someone can take a look at this setup; throw tomatoes if it looks too bad. We're expecting an initial load of about 5 million text meta-data records to our database; and are expecting upwards of 50 million records by 2008. We are expecting 40 "connect-query-disconnect' clients every 5 minutes or so, and are looking at 15 connections/sec on our front facing components. We've designed a set of Dell systems which we are planning to stick into our Slony/PgPool-II hybrid cluster; taking over our current random hodgepodge of machines we used when first experimenting. Each of these systems will be identical. Speed is important but we are putting more weight on the storage aspects. Below is our model system: Dell PowerEdge Energy 2950 (2) Quad Core Intel Xeon L5320, 2x4MB Cache, 1.86Ghz, 1066Mhz FSB 4GB 667Mhz Dual Ranked DIMMs, Energy Smart PERC 5/i, x8 Backplane, Integrated Controller Card Hard Drive Configuration: Integrated SAS/SATA RAID1/Raid 5 Hard Drive 1 (For Operating System): 36GB 10K RPM SAS 3Gbps 2.5-in Hot Plug HD Hard Drive 2 (For logs): 36GB 10K RPM SAS 3Gbps 2.5-in Hot Plug HD Hard Drives 3,4,5,6 (In a RAID 5 Configuration): (4) 146GB 10K SAS 3Gbps Hard Drive, 2-5 inch, Hot Plug Network Adapter: Dual Embedded Broadcom NetXTreme II 5708 Gigabit Ethernet NIC It's overkill for our initial system but we are shooting for a system that allows for growth. If someone can let us know if we're on the right path or are shooting ourselves in the foot with this setup I'd appreciate it. Thanks, - Mark
On 11/1/07, Mark Floyd <mfloyd@evryx.com> wrote: > Hello, > Dell PowerEdge Energy 2950 > (2) Quad Core Intel Xeon L5320, 2x4MB Cache, 1.86Ghz, 1066Mhz FSB > 4GB 667Mhz Dual Ranked DIMMs, Energy Smart > > PERC 5/i, x8 Backplane, Integrated Controller Card > > Hard Drive Configuration: Integrated SAS/SATA RAID1/Raid 5 > > Hard Drive 1 (For Operating System): 36GB 10K RPM SAS 3Gbps 2.5-in > Hot Plug HD > Hard Drive 2 (For logs): 36GB 10K RPM SAS 3Gbps 2.5-in Hot Plug HD > > Hard Drives 3,4,5,6 (In a RAID 5 Configuration): (4) 146GB 10K SAS > 3Gbps Hard Drive, 2-5 inch, Hot Plug If you can fit 8 drives in it, for the love of god add two more and mirror your OS and xlog drives ( I assume that's what you mean by drive 2 for logs). Running a server on non-redundant drives is not the best way to do things. And if you can live on ~ 300 Gigs of storage instead of 450 Gigs, look into RAID-10 for your data array. RAID 10 is noticeably faster than RAID-5 for any database that sees a fair bit of writing activity. > It's overkill for our initial system but we are shooting for a system > that allows for growth. If someone can let us know if we're on the > right path or are shooting ourselves in the foot with this setup I'd > appreciate it. Other than the 8 cores, it's not really overkill. And depending on your usage patterns 8 cores may well not be overkill too.