-performance storage features that reduce hardware costs-and it has built-in hardware redundancy that supports fault tolerance
APS provides an in-memory, updatable field storage index that supports up to 15 times times the data compression rate , saving up to 70% of storage requirements.
APS is a rack-based system and therefore does not buy too much capacity, starting with a one-fourth rack, which supports modifying the size of the device, and then, in the future, it can be scaled by usi
, ERP server, etc.Servers are categorized by form factor:Tower servers, rack servers, blade serversServer classificationDepending on the CPU architecture, the server is divided into two main categories:Non-x86 server: Using RISC (thin instruction set) or epic (parallel instruction code) processor, and mainly with UNIX and other dedicated operating system of the server, the instruction system is relatively simple, it only requires the hardware to perform a very limited and most commonly used part
One, CPU maximum performance mode CPU utilization characteristics
5.1 Maximum usable 4 cores
5.5 Maximum usable 24 cores
5.6 Maximum Usable 64 cores
Once query corresponds to a logical CPU
If you look closely, there is an interesting phenomenon on some servers: when you cat/proc/cpuinfo, you will find that the CPU frequency is not the same as its nominal frequency:#cat/proc/cpuinfo Processor:5model Name:intel (R) Xeon (r) CPU
occupancy rates are better controlled.
====================================================== Squid 2.6 2.7 3.0 3.1 and Varnish 2.1.5 performance comparison test
Http://www.cnblogs.com/littlehb/archive/2012/02/21/2360787.html
Description
Use the stress test software siege,http_load to test these agent software, testing different sizes of files and various concurrent numbers.
Squid version selection, taking into account the actual use of some of the requirements, and reference to some other a
I believe everyone knows about Tianhe 2, ranking first among the top 2013 and 2014 top500, which is one time faster than the top 2nd Titan, what kind of architecture does Tianhe 2 use to achieve this capability? Let's take a look at it.
Tianhe No. 2 Model for TH-IVB-FEP, using the central processor and co-processor computing architecture layout:
Tianhe 2 has a total of 16,000 computing nodes, each of which is equipped with two Xeon E5 12 core central
Heterogeneous computing:Heterogeneous computing uses different types of processors to handle different types of computing tasks. Common computing units include CPUs, GPGPU, GPDSP, Asics, FPGAs, and other types of core processors.There are many accelerator cards or coprocessors that are used to increase system performance, which are common:GPGPU is the most common accelerator card, connected by PCI-E. The GPU was first used for graphics processing cards, the graphics card, and then slowly develop
The number of Linux CPUs is judged by/proc/cpuinfo.Same Physical ID: determines a physical processorIf "siblings" and "CPU cores" are consistent, hyper-threading is not supported, or hyper-threading is not open.If "siblings" is twice Times "CPU cores", then hyper-Threading is supported and Hyper-threading is turned on.In fact, just#include Long num = sysconf (_SC_NPROCESSORS_ONLN);You can get the current number of CPUs ...Basis of judgment:1. CPUs with the same core ID are Hyper-threading of the
) Processorcache size:64 KBExample 2:single processor, 1 core, hyperthreading is enabled.Notice how we had 2 siblings, but only 1 core. The physical CPU ID is the same for both:0.Processor:0model Name:intel (R) Pentium (r) 4 CPU 2.80GHzcache size:1024 kbphysical id:0siblings:2core id:0cpu cores: 1processor:1model Name:intel (R) Pentium (r) 4 CPU 2.80GHzcache size:1024 kbphysical id:0siblings:2core id:0cpu cores: 1Example 3. Single Socket Quad CoreNotice how each processor have its own core ID.
In fact, as long as
#include Long num = sysconf (_SC_NPROCESSORS_ONLN);
You can get the current number of CPUs ...
Judge the basis:1. CPUs with the same core ID are the same core hyper-threading.2. CPUs with the same physical ID are the same CPU-encapsulated threads or cores.
English version:1.Physical ID and core ID are not necessarily consecutive but they unique. Any CPUs with the same core ID are hyperthreads in the same core.2.Any CPU with the same physical ID are threads or cores in the
When using a system, we must look at the system configuration, while the CentOS system looks at the configuration, it is not as intuitive as windows. You can only view them one by one. Many people are overwhelmed by how to view the CPU of the CentOS system. Next, let's learn how to view the CPU in the CentOS system. I. CentOS cpu [root @ srv/] # more/proc/cpuinfo | grep quot; m
When using a system, we must look at the system configuration, while the CentOS system looks at the configuration, it
When using a system, we must look at the system configuration, while the CentOS system looks at the configuration, it is not as intuitive as windows. You can only view them one by one. Many people are overwhelmed by how to view the CPU Of The CentOS system.
Next, let's learn how to view the CPU in the CentOS system.
I. CentOS system cpu
[Root @ srv/] # more/proc/cpuinfo | grep "model name"
Model name: Intel (R) Xeon (R) CPU X3220 @ 2.40 GHz
Model name
or cores in the same physical socket.Instance:Lunarpages CPU Information:processor:0Vendor_id:genuineintelCPU Family:15Model:4Model Name:intel (R) Xeon (TM) CPU 3.00GHzStepping:3CPU mhz:3000.881Cache size:2048 KBPhysical id:0Siblings:2Core id:0CPU Cores:1Fdiv_bug:noHlt_bug:noF00f_bug:noComa_bug:noFpu:yesFpu_exception:yesCPUID Level:5Wp:yesFLAGS:FPU VME de PSE TSC MSR PAE MCE cx8 APIC MTRR PGE MCA cmov Pat PSE36 clflush DTS ACPI MMX FXSR SSE s SE2 SS
Get a system, sure to see the system configuration, Linux look at the configuration, can not be as intuitive as windows. You can only view one one.
One: CPU
[Root@srv/]# More/proc/cpuinfo | grep "model name"
Model Name:intel (R) Xeon (r) CPU X3220 @ 2.40GHz
Model Name:intel (R) Xeon (r) CPU X3220 @ 2.40GHz
Model Name:intel (R) Xeon (r) CPU X3220 @ 2.40GHz
Model N
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