\u5728\u591a\u8def\u670d\u52a1\u5668\u67b6\u6784\u4e2d，\u6bcf\u4e2a CPU \u63d2\u69fd\u90fd\u6709\u81ea\u5df1\u672c\u5730\u8fde\u63a5\u7684 DIMM \u5185\u5b58\u901a\u9053\u3002\u8bbf\u95ee\u672c\u5730\u5185\u5b58\u7684\u5ef6\u8fdf\u901a\u5e38\u5728 80100ns，\u800c\u8de8 CPU \u8bbf\u95ee\u5bf9\u7aef\u5185\u5b58（remote access）\u7684\u5ef6\u8fdf\u4f1a\u589e\u52a0\u5230 180220ns\u3002\u8fd9\u4e00\u500d\u7684\u5ef6\u8fdf\u5dee\u8ddd\u4e0d\u662f\u7406\u8bba\u6570\u5b57\u2014\u2014\u5728\u751f\u4ea7\u73af\u5883\u7684 MySQL InnoDB \u7f13\u51b2\u6c60\u547d\u4e2d\u8def\u5f84\u4e0a，\u9891\u7e41\u7684\u8de8 NUMA \u8282\u70b9\u8bbf\u95ee\u53ef\u4ee5\u76f4\u63a5\u5c06 TP99 \u5ef6\u8fdf\u4ece 1.2ms \u63a8\u9ad8\u5230 3.8ms\u3002<\/p>\n
\u95ee\u9898\u5728\u4e8e，\u64cd\u4f5c\u7cfb\u7edf\u9ed8\u8ba4\u7684\u5185\u5b58\u5206\u914d\u7b56\u7565（MPOL_DEFAULT）\u4f1a\u4f18\u5148\u5728\u53d1\u8d77\u5206\u914d\u7684\u7ebf\u7a0b\u6240\u5728 NUMA \u8282\u70b9\u4e0a\u5206\u914d\u5185\u5b58，\u4f46\u7ebf\u7a0b\u4f1a\u88ab\u8c03\u5ea6\u5668\u8fc1\u79fb\u5230\u5176\u4ed6 NUMA \u8282\u70b9\u7684 CPU \u6838\u5fc3\u4e0a\u8fd0\u884c\u3002\u7ed3\u679c\u5c31\u662f\u7ebf\u7a0b\u5728 Node 0 \u4e0a\u5206\u914d\u4e86\u5185\u5b58，\u5374\u88ab\u8c03\u5ea6\u5230 Node 1 \u7684\u6838\u5fc3\u4e0a\u6267\u884c\u2014\u2014\u6bcf\u4e00\u6b21\u5185\u5b58\u8bbf\u95ee\u90fd\u5728\u8de8\u8282\u70b9\u6267\u884c，\u5ef6\u8fdf\u76f4\u63a5\u7ffb\u500d\u3002<\/p>\n
\u66f4\u9690\u853d\u7684\u662f，dual-socket \u670d\u52a1\u5668\u7684\u4e24\u4e2a CPU \u4e4b\u95f4\u901a\u8fc7 UPI（Ultra Path Interconnect）\u6216 Infinity Fabric \u8fde\u63a5，\u8fd9\u4e2a inter-socket \u94fe\u8def\u7684\u5e26\u5bbd\u4e0a\u9650\u8fdc\u4f4e\u4e8e\u672c\u5730\u5185\u5b58\u5e26\u5bbd\u3002\u5728 Intel Xeon Platinum \u5e73\u53f0\u4e0a，\u5355\u8def\u5185\u5b58\u5e26\u5bbd\u7ea6 200GB\/s，\u800c UPI \u94fe\u8def\u5e26\u5bbd\u7ea6 30~40GB\/s\u3002\u5f53\u591a\u4e2a\u8fdb\u7a0b\u540c\u65f6\u8de8\u8282\u70b9\u8bbf\u95ee\u5185\u5b58\u65f6，UPI \u94fe\u8def\u8fc5\u901f\u9971\u548c，\u5f62\u6210\u5168\u5c40\u6027\u7684\u5ef6\u8fdf\u5c16\u5cf0\u3002<\/p>\n
graph TB
\n subgraph NUMA_Node_0
\n CPU0[CPU Cores 0-15] — L3_0[L3 Cache 32MB]
\n L3_0 — IMC0[\u5185\u5b58\u63a7\u5236\u5668 0]
\n IMC0 — DDR0[DDR4 DIMM 0]
\n IMC0 — DDR1[DDR4 DIMM 1]
\n end<\/p>\n
subgraph NUMA_Node_1
\n CPU1[CPU Cores 16-31] — L3_1[L3 Cache 32MB]
\n L3_1 — IMC1[\u5185\u5b58\u63a7\u5236\u5668 1]
\n IMC1 — DDR2[DDR4 DIMM 2]
\n IMC1 — DDR3[DDR4 DIMM 3]
\n end<\/p>\n
CPU0 <==>|UPI 10.4 GT\/s<br\/>~38GB\/s \u5e26\u5bbd| CPU1<\/p>\n
APP0[\u8fdb\u7a0b A<br\/>\u7ed1\u5b9a Node 0] -.-> CPU0
\n APP1[\u8fdb\u7a0b B<br\/>\u7ed1\u5b9a Node 1] -.-> CPU1<\/p>\n
style CPU0 fill:#c8e6c9
\n style CPU1 fill:#c8e6c9
\n style DDR0 fill:#e1f5fe
\n style DDR1 fill:#e1f5fe
\n style DDR2 fill:#e1f5fe
\n style DDR3 fill:#e1f5fe<\/p>\n
Linux \u5185\u6838\u7684\u8c03\u5ea6\u5668（CFS）\u5728\u505a\u8d1f\u8f7d\u5747\u8861\u65f6\u4f1a\u8de8 NUMA \u8282\u70b9\u8fc1\u79fb\u4efb\u52a1\u3002\u8c03\u5ea6\u5668\u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u516c\u5e73\u6027\u2014\u2014\u8ba9\u6240\u6709 CPU \u90fd\u5fd9\u788c\u8d77\u6765，\u907f\u514d\u67d0\u4e9b\u6838\u5fc3\u7a7a\u95f2\u3002\u4f46\u8c03\u5ea6\u5668\u4e0d\u77e5\u9053\u88ab\u8fc1\u79fb\u7684\u7ebf\u7a0b\u7684\u672c\u5730\u5185\u5b58\u4eb2\u548c\u6027\u5df2\u7ecf\u5931\u6548\u3002<\/p>\n
\u5373\u4f7f\u5f00\u542f\u4e86 numa_balancing（\u5185\u6838 3.13+），\u5185\u6838\u7684\u81ea\u52a8 NUMA \u8fc1\u79fb\u673a\u5236\u4e5f\u9762\u4e34\u4e00\u4e2a\u6839\u672c\u6027\u7684\u6570\u636e\u532e\u4e4f\u95ee\u9898：\u5185\u6838\u53ea\u80fd\u89c2\u5bdf\u5230\u9875\u8868\u7684\u8bbf\u95ee\u4f4d，\u8fd9\u4e2a\u6570\u636e\u7c92\u5ea6\u592a\u7c97\u3002\u9875\u8868\u7684 Dirty\/Accessed \u4f4d\u5728 TLBs \u5237\u65b0\u65f6\u624d\u4f1a\u88ab\u66f4\u65b0，\u9891\u7387\u8fdc\u4f4e\u4e8e\u5b9e\u9645\u7684\u5185\u5b58\u8bbf\u95ee\u3002\u8fd9\u610f\u5473\u7740\u5185\u6838\u5728\u505a"\u662f\u5426\u8fc1\u79fb\u5185\u5b58\u9875"\u7684\u51b3\u7b56\u65f6，\u4f9d\u636e\u7684\u662f\u8fc7\u65f6\u4e14\u4e0d\u5b8c\u6574\u7684\u4fe1\u606f\u3002<\/p>\n
# numastat \u8f93\u51fa\u793a\u4f8b\u2014\u2014\u5173\u6ce8 numa_miss \u548c numa_foreign \u4e24\u4e2a\u5173\u952e\u6307\u6807
\n# numa_miss: \u672c\u8282\u70b9\u7ebf\u7a0b\u53bb\u5206\u914d\u5176\u4ed6\u8282\u70b9\u5185\u5b58\u7684\u6b21\u6570（\u8d8a\u9ad8\u8bf4\u660e\u5206\u914d\u7b56\u7565\u6709\u95ee\u9898）
\n# numa_foreign: \u5176\u4ed6\u8282\u70b9\u7ebf\u7a0b\u6765\u5206\u914d\u672c\u8282\u70b9\u5185\u5b58\u7684\u6b21\u6570
\n$ numastat -p $(pgrep mysqld)<\/p>\n
Per-node process memory usage (in MBs) for PID 31142 (mysqld):
\n Node 0 Node 1 Total
\n ————— ————— —————
\nHuge 0.00 0.00 0.00
\nHeap 512.34 1536.12 2048.46
\nStack 0.45 0.38 0.83
\nPrivate 30000.12 10000.34 40000.46
\n—————- ————— ————— —————
\nTotal 30512.91 11536.84 42049.75<\/p>\n
# \u5982\u679c\u4e00\u4e2a\u670d\u52a1\u4e3b\u8981\u5728 Node 0 \u4e0a\u8fd0\u884c，\u4f46\u5927\u534a\u5185\u5b58\u5206\u914d\u5728 Node 1
\n# \u8bf4\u660e\u5b58\u5728\u4e25\u91cd\u7684 NUMA \u5206\u5e03\u9519\u914d\u2014\u2014\u9700\u8981\u901a\u8fc7 numactl \u91cd\u65b0\u7ed1\u5b9a<\/p>\n
# \u5c06 MySQL \u8fdb\u7a0b\u7ed1\u5b9a\u5230 NUMA Node 0，\u5e76\u4f7f\u7528\u4ea4\u9519\u6a21\u5f0f\u5206\u914d\u5185\u5b58
\n# –cpunodebind=0: \u8fdb\u7a0b\u548c\u5b83\u521b\u5efa\u7684\u6240\u6709\u7ebf\u7a0b\u53ea\u80fd\u5728 Node 0 \u7684 CPU \u4e0a\u8fd0\u884c
\n# –membind=0: \u5185\u5b58\u5206\u914d\u4e25\u683c\u9650\u5236\u5728 Node 0\u2014\u2014\u907f\u514d\u8de8\u8282\u70b9\u8bbf\u95ee
\n# \u8b66\u544a：\u5982\u679c Node 0 \u5185\u5b58\u4e0d\u8db3，OOM Killer \u4f1a\u88ab\u89e6\u53d1
\nnumactl –cpunodebind=0 –membind=0 \\\\
\n \/usr\/sbin\/mysqld –defaults-file=\/etc\/my.cnf<\/p>\n
# \u5bf9\u4e8e\u5927\u578b InnoDB Buffer Pool（\u5982 128GB+），\u5982\u679c\u5355\u8def\u5185\u5b58\u4e0d\u8db3\u4ee5\u5bb9\u7eb3
\n# \u53ef\u4ee5\u4f7f\u7528 –interleave \u5728\u5404\u4e2a\u8282\u70b9\u4e0a\u5747\u5300\u5206\u914d
\n# \u8fd9\u79cd\u7b56\u7565\u727a\u7272\u4e86\u5c40\u90e8\u6027，\u4f46\u907f\u514d\u4e86\u5355\u8282\u70b9 OOM
\nnumactl –interleave=all \\\\
\n \/usr\/sbin\/mysqld –defaults-file=\/etc\/my.cnf<\/p>\n
package numa<\/p>\n
import (
\n "runtime"
\n "syscall"
\n "unsafe"
\n)<\/p>\n
\/\/ NumaPool \u662f NUMA \u611f\u77e5\u7684\u5185\u5b58\u5206\u914d\u5668
\n\/\/ \u8bbe\u8ba1\u76ee\u6807：\u51cf\u5c11\u8de8\u8282\u70b9\u5185\u5b58\u8bbf\u95ee，\u63d0\u5347\u7f13\u5b58\u5c40\u90e8\u6027
\n\/\/ \u9002\u7528\u573a\u666f：16+ \u6838\u5fc3\u7684\u670d\u52a1\u7aef\u7a0b\u5e8f，\u5982 HTTP Server\u3001RPC Framework
\ntype NumaPool struct {
\n nodeID int
\n cpuidxs []int \/\/ \u8be5 NUMA \u8282\u70b9\u7684 CPU \u6838\u5fc3\u5217\u8868
\n}<\/p>\n
\/\/ NewNumaPool \u521b\u5efa\u4e00\u4e2a\u7ed1\u5b9a\u5230\u6307\u5b9a NUMA \u8282\u70b9\u7684\u5185\u5b58\u6c60
\n\/\/ nodeID \u4ece \/sys\/devices\/system\/node\/ \u76ee\u5f55\u8bfb\u53d6
\nfunc NewNumaPool(nodeID int) (*NumaPool, error) {
\n cpuidxs, err := getCPUListForNode(nodeID)
\n if err != nil {
\n return nil, err
\n }<\/p>\n
pool := &NumaPool{
\n nodeID: nodeID,
\n cpuidxs: cpuidxs,
\n }<\/p>\n
return pool, nil
\n}<\/p>\n
\/\/ ExecOnNode \u5728\u6307\u5b9a NUMA \u8282\u70b9\u4e0a\u6267\u884c\u51fd\u6570
\n\/\/ \u901a\u8fc7 runtime.LockOSThread \u5c06\u5f53\u524d goroutine \u9501\u5b9a\u5230\u7279\u5b9a OS \u7ebf\u7a0b
\n\/\/ \u914d\u5408 syscall.SchedSetaffinity \u5c06\u8be5\u7ebf\u7a0b\u7ed1\u5b9a\u5230\u76ee\u6807 NUMA \u8282\u70b9\u7684 CPU \u6838\u5fc3
\n\/\/ \u6ce8\u610f：LockOSThread \u4f7f\u8be5 goroutine \u72ec\u5360\u4e00\u4e2a\u7ebf\u7a0b\u2014\u2014\u4e0d\u9002\u5408\u521b\u5efa\u4e0a\u4e07\u4e2a goroutine \u7684\u573a\u666f
\nfunc (np *NumaPool) ExecOnNode(fn func()) {
\n \/\/ \u5c06\u5f53\u524d goroutine \u9501\u5b9a\u5230 OS \u7ebf\u7a0b
\n \/\/ \u8fd9\u786e\u4fdd\u540e\u7eed\u7684 CPU affinity \u8bbe\u7f6e\u4e0d\u4f1a\u88ab\u5b50 goroutine \u7ee7\u627f
\n runtime.LockOSThread()
\n defer runtime.UnlockOSThread()<\/p>\n
\/\/ \u6784\u5efa CPU \u4eb2\u548c\u6027\u63a9\u7801\u2014\u2014\u53ea\u5141\u8bb8\u5728\u8be5 NUMA \u8282\u70b9\u7684\u6838\u5fc3\u4e0a\u8fd0\u884c
\n \/\/ CPU \u96c6\u5408\u5927\u5c0f\u9700\u8981\u4e0e\u5b9e\u9645\u7684\u6838\u5fc3\u6570\u5339\u914d（\u901a\u8fc7 runtime.NumCPU() \u53d6\u4e0a\u9650）
\n var cpuset syscall.CPUSet
\n for _, cpuidx := range np.cpuidxs {
\n cpuset.Set(cpuidx)
\n }<\/p>\n
\/\/ \u8bbe\u7f6e\u7ebf\u7a0b\u7684 CPU \u4eb2\u548c\u6027
\n \/\/ \u4e4b\u540e\u8be5\u7ebf\u7a0b\u7684\u6240\u6709\u5185\u5b58\u5206\u914d\u90fd\u4f1a\u4f18\u5148\u5728\u672c\u5730 NUMA \u8282\u70b9\u4e0a
\n if err := syscall.SchedSetaffinity(0, &cpuset); err != nil {
\n \/\/ \u5728\u751f\u4ea7\u4ee3\u7801\u4e2d\u5e94\u8bb0\u5f55\u9519\u8bef\u5e76\u51b3\u5b9a\u662f\u964d\u7ea7\u8fd8\u662f panic
\n \/\/ \u6b64\u5904\u4e3a\u4e86\u6f14\u793a\u7b80\u6d01，\u76f4\u63a5 panic\u2014\u2014\u5b9e\u9645\u5e94\u4e0e\u76d1\u63a7\u7cfb\u7edf\u8054\u52a8
\n panic("failed to set CPU affinity: " + err.Error())
\n }<\/p>\n
fn()
\n}<\/p>\n
\/\/ AllocLocal \u5728\u672c\u5730 NUMA \u8282\u70b9\u4e0a\u5206\u914d\u56fa\u5b9a\u5927\u5c0f\u7684\u5b57\u8282\u5207\u7247
\n\/\/ \u8b66\u544a：\u8fd9\u4e2a\u65b9\u6cd5\u4f7f\u7528\u4e86 mmap \u7684\u76f4\u63a5\u8c03\u7528，\u751f\u4ea7\u4ee3\u7801\u9700\u8981\u5b8c\u5584\u7684\u9519\u8bef\u5904\u7406\u548c\u91ca\u653e\u903b\u8f91
\nfunc (np *NumaPool) AllocLocal(size int) ([]byte, error) {
\n \/\/ \u4f7f\u7528 mmap \u7684 MAP_ANONYMOUS | MAP_PRIVATE \u6807\u5fd7\u5206\u914d\u533f\u540d\u5185\u5b58
\n \/\/ \u914d\u5408 runtime.LockOSThread \u9501\u5b9a\u7ebf\u7a0b\u540e，\u5185\u6838\u4f1a\u5c06\u7269\u7406\u9875\u9762\u5206\u914d\u5728\u672c\u5730 NUMA \u8282\u70b9\u4e0a
\n data, err := syscall.Mmap(
\n -1, 0, size,
\n syscall.PROT_READ|syscall.PROT_WRITE,
\n syscall.MAP_ANONYMOUS|syscall.MAP_PRIVATE,
\n )
\n if err != nil {
\n return nil, err
\n }
\n return data, nil
\n}<\/p>\n
\/\/ getCPUListForNode \u4ece sysfs \u8bfb\u53d6\u6307\u5b9a NUMA \u8282\u70b9\u7684 CPU \u5217\u8868
\n\/\/ \u8bfb\u53d6 \/sys\/devices\/system\/node\/node{N}\/cpulist
\n\/\/ \u8fd4\u56de\u683c\u5f0f\u5982 "0-15,32-47" \u7684\u89e3\u6790\u7ed3\u679c
\nfunc getCPUListForNode(nodeID int) ([]int, error) {
\n \/\/ \u5b9e\u73b0\u7565\u2014\u2014\u901a\u8fc7 ioutil.ReadFile \u8bfb\u53d6 cpulist \u6587\u4ef6\u5e76\u89e3\u6790\u8303\u56f4
\n \/\/ \u6838\u5fc3\u8def\u5f84: \/sys\/devices\/system\/node\/node{nodeID}\/cpulist
\n \/\/ \u793a\u4f8b\u8f93\u51fa: "0-7,16-23" \u2192 [0,1,2,3,4,5,6,7,16,17,18,19,20,21,22,23]
\n return nil, nil
\n}<\/p>\n
NUMA \u4f18\u5316\u4e0d\u662f\u5305\u6cbb\u767e\u75c5\u7684\u65b9\u6848，\u5b83\u6709\u660e\u786e\u7684\u9002\u7528\u548c\u4e0d\u9002\u7528\u573a\u666f：<\/p>\n
\u660e\u786e\u9002\u7528：<\/p>\n
\u660e\u786e\u4e0d\u9002\u7528：<\/p>\n
\u53cd\u6a21\u5f0f：\u5728 64 \u6838\u4e3b\u673a\u4e0a\u4e3a\u6bcf\u4e2a goroutine \u5355\u72ec\u7ed1\u5b9a NUMA \u8282\u70b9\u3002\u6bcf\u4e2a goroutine \u7684\u6808\u53ea\u6709 28KB，NUMA \u5185\u5b58\u5206\u914d\u7684\u7c92\u5ea6\u901a\u5e38\u662f 4KB \u9875，\u5355\u4e2a goroutine \u7684\u70ed\u6570\u636e\u8fdc\u4e0d\u8db3\u4ee5\u586b\u6ee1\u4e00\u4e2a cache line\u3002\u6b63\u786e\u7684\u505a\u6cd5\u662f\u6309\u5de5\u4f5c\u6c60（worker pool）\u7ea7\u522b\u7ed1\u5b9a\u2014\u2014\u5c06 816 \u4e2a worker \u7ed1\u5b9a\u5230\u540c\u4e00\u4e2a NUMA \u8282\u70b9\u3002<\/p>\n
NUMA \u4f18\u5316\u662f\u5bf9\u786c\u4ef6\u62d3\u6251\u7684\u663e\u5f0f\u5229\u7528\u3002\u5b83\u7684\u6838\u5fc3\u4e0d\u662f\u628a\u8c03\u5ea6\u5668\u7684\u4e8b\u505a\u4e00\u904d，\u800c\u662f\u5728\u64cd\u4f5c\u7cfb\u7edf\u4e0d\u77e5\u9053\u4f60\u7a0b\u5e8f\u7684\u8bbf\u95ee\u6a21\u5f0f\u65f6，\u76f4\u63a5\u544a\u8bc9\u5b83\u5185\u5b58\u5e94\u8be5\u5206\u914d\u5728\u54ea\u91cc\u3001\u7ebf\u7a0b\u5e94\u8be5\u8fd0\u884c\u5728\u54ea\u91cc\u3002<\/p>\n
\u63a8\u8350\u7684\u5b9e\u8df5\u8def\u5f84：(1) \u5148\u7528 numastat -p <pid> \u8bca\u65ad\u662f\u5426\u5b58\u5728\u4e25\u91cd\u7684\u8de8\u8282\u70b9\u8bbf\u95ee（numa_miss \u5360\u6bd4 > 20% \u5373\u4e3a\u9700\u8981\u4f18\u5316）；(2) \u5bf9\u6570\u636e\u5e93\u3001\u6d88\u606f\u961f\u5217\u7b49\u6709\u72b6\u6001\u670d\u52a1\u4f7f\u7528 numactl –membind \u505a\u8fdb\u7a0b\u7ea7\u7ed1\u5b9a；(3) \u5bf9\u81ea\u7814 RPC \u6846\u67b6\u90e8\u7f72 NUMA \u611f\u77e5\u7684\u5de5\u4f5c\u6c60，\u5728\u7f16\u8bd1\u671f\u901a\u8fc7 Rust \u7684 #[cfg(target_os = "linux")] \u6761\u4ef6\u7f16\u8bd1\u2014\u2014\u975e Linux \u5e73\u53f0\u4f7f\u7528 no-op \u7684\u964d\u7ea7\u5b9e\u73b0；(4) \u5728 K8s \u73af\u5883\u4e2d\u5229\u7528 topology manager \u548c CPU Manager \u7684 static policy \u4e3a Guaranteed QoS \u7684 Pod \u63d0\u4f9b\u5355 NUMA \u8282\u70b9\u9694\u79bb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
NUMA \u4eb2\u548c\u6027\u4e0e\u5185\u5b58\u5e26\u5bbd\u4f18\u5316\u2014\u2014\u53cc\u8def\u670d\u52a1\u5668\u7684\u5c31\u8fd1\u53d6\u6570\u7b56\u7565
\n\u4e00\u3001\u5f53 CPU \u79bb\u6570\u636e 200ns \u8fdc：\u53cc\u8def\u670d\u52a1\u5668\u7684\u9690\u6027\u5ef6\u8fdf\u7a0e
\n\u5728\u591a\u8def\u670d\u52a1\u5668\u67b6\u6784\u4e2d，\u6bcf\u4e2a CPU \u63d2\u69fd\u90fd\u6709\u81ea\u5df1\u672c\u5730\u8fde\u63a5\u7684 DIMM \u5185\u5b58\u901a\u9053\u3002\u8bbf\u95ee\u672c\u5730\u5185\u5b58\u7684\u5ef6\u8fdf\u901a\u5e38\u5728 80100ns，\u800c\u8de8 CPU \u8bbf\u95ee\u5bf9\u7aef\u5185\u5b58（remote access）\u7684\u5ef6\u8fdf\u4f1a\u589e\u52a0\u5230 180220ns\u3002\u8fd9\u4e00\u500d\u7684\u5ef6\u8fdf\u5dee\u8ddd\u4e0d\u662f\u7406\u8bba\u6570\u5b57\u2014\u2014\u5728\u751f\u4ea7\u73af\u5883\u7684 MySQL InnoDB \u7f13\u51b2<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[50],"topic":[],"class_list":["post-81728","post","type-post","status-publish","format-standard","hentry","category-server","tag-50"],"yoast_head":"\n