\u6709\u65f6\u5019\u6211\u4eec\u5728\u505a\u7ef4\u62a4\u7684\u65f6\u5019\uff0c\u603b\u4f1a\u9047\u5230\u7c7b\u4f3c\u4e8eIO\u7279\u522b\u9ad8\uff0c\u4f46\u4e0d\u80fd\u5224\u5b9a\u662fIO\u74f6\u9888\u8fd8\u662f\u8f6f\u4ef6\u53c2\u6570\u8bbe\u7f6e\u4e0d\u5f53\u5bfc\u81f4\u70ed\u76d8\u7684\u95ee\u9898.\u8fd9\u65f6\u5019\u901a\u5e38\u5e0c\u671b\u80fd\u77e5\u9053\u78c1\u76d8\u7684\u8bfb\u5199\u901f\u5ea6\uff0c\u6765\u8fdb\u884c\u4e0b\u4e00\u6b65\u7684\u51b3\u7b56\u3002<\/p>\n
\u4e0b\u9762\u662f\u4e24\u79cd\u6d4b\u8bd5\u65b9\u6cd5\uff1a<\/p>\n
(1)\u4f7f\u7528hdparm\u547d\u4ee4<\/p>\n
\u8fd9\u662f\u4e00\u4e2a\u662f\u7528\u6765\u83b7\u53d6ATA\/IDE\u786c\u76d8\u7684\u53c2\u6570\u7684\u547d\u4ee4\uff0c\u662f\u7531\u65e9\u671fLinux IDE\u9a71\u52a8\u7684\u5f00\u53d1\u548c\u7ef4\u62a4\u4eba\u5458 Mark Lord\u5f00\u53d1\u7f16\u5199\u7684( hdparm has been written by Mark Lord \uff0c the primary developer and maintainer of the (E)IDE driver for Linux\uff0c with suggestions from many netfolk).\u8be5\u547d\u4ee4\u5e94\u8be5\u4e5f\u662f\u4ec5\u7528\u4e8eLinux\u7cfb\u7edf\uff0c\u5bf9\u4e8eUNIX\u7cfb\u7edf\uff0cATA\/IDE\u786c\u76d8\u7528\u7684\u53ef\u80fd\u6bd4\u8f83\u5c11\uff0c\u4e00\u822c\u5927\u578b\u7684\u7cfb\u7edf\u90fd\u662f\u4f7f\u7528\u78c1\u76d8\u9635\u5217\u7684.<\/p>\n
\u4f7f\u7528\u65b9\u6cd5\u5f88\u7b80\u5355<\/p>\n
# hdparm -Tt \/dev\/sda<\/p>\n
\/dev\/sda\uff1a<\/p>\n
Timing cached reads\uff1a 6676 MB in 2.00 seconds = 3340.18 MB\/sec<\/p>\n
Timing buffered disk reads\uff1a 218 MB in 3.11 seconds = 70.11 MB\/sec<\/p>\n
\u53ef\u4ee5\u770b\u5230\uff0c2\u79d2\u949f\u8bfb\u53d6\u4e866676MB\u7684\u7f13\u5b58\uff0c\u7ea6\u54083340.18 MB\/sec;<\/p>\n
\u57283.11\u79d2\u4e2d\u8bfb\u53d6\u4e86218MB\u78c1\u76d8(\u7269\u7406\u8bfb)\uff0c\u8bfb\u53d6\u901f\u5ea6\u7ea6\u540870.11 MB\/sec<\/p>\n
(2)\u4f7f\u7528dd\u547d\u4ee4<\/p>\n
\u8fd9\u4e0d\u662f\u4e00\u4e2a\u4e13\u4e1a\u7684\u6d4b\u8bd5\u5de5\u5177\uff0c\u4e0d\u8fc7\u5982\u679c\u5bf9\u4e8e\u6d4b\u8bd5\u7ed3\u679c\u7684\u8981\u6c42\u4e0d\u662f\u5f88\u82db\u523b\u7684\u8bdd\uff0c\u5e73\u65f6\u53ef\u4ee5\u4f7f\u7528\u6765\u5bf9\u78c1\u76d8\u7684\u8bfb\u5199\u901f\u5ea6\u4f5c\u4e00\u4e2a\u7b80\u5355\u7684\u8bc4\u4f30.<\/p>\n
\u53e6\u5916\u7531\u4e8e\u8fd9\u662f\u4e00\u4e2a\u514d\u8d39\u8f6f\u4ef6\uff0c\u57fa\u672c\u4e0a×NIX\u7cfb\u7edf\u4e0a\u90fd\u6709\u5b89\u88c5\uff0c\u5bf9\u4e8eOracle\u88f8\u8bbe\u5907\u7684\u590d\u5236\u8fc1\u79fb\uff0cdd\u5de5\u5177\u4e00\u822c\u90fd\u662f\u9996\u9009.<\/p>\n
\u5728\u4f7f\u7528\u524d\u9996\u5148\u4e86\u89e3\u4e24\u4e2a\u7279\u6b8a\u8bbe\u5907<\/p>\n
\/dev\/null \u4f2a\u8bbe\u5907\uff0c\u56de\u6536\u7ad9.\u5199\u8be5\u6587\u4ef6\u4e0d\u4f1a\u4ea7\u751fIO<\/p>\n
\/dev\/zero \u4f2a\u8bbe\u5907\uff0c\u4f1a\u4ea7\u751f\u7a7a\u5b57\u7b26\u6d41\uff0c\u5bf9\u5b83\u4e0d\u4f1a\u4ea7\u751fIO<\/p>\n
\u6d4b\u8bd5\u65b9\u6cd5\uff1a<\/p>\n
a.\u6d4b\u8bd5\u78c1\u76d8\u7684IO\u5199\u901f\u5ea6<\/p>\n
# time dd if=\/dev\/zero of=\/test.dbf bs=8k count=300000<\/p>\n
300000+0 records in<\/p>\n
300000+0 records out<\/p>\n
10.59s real 0.43s user 9.40s system<\/p>\n
# du -sm \/test.dbf<\/p>\n
2347 \/test.dbf<\/p>\n
\u53ef\u4ee5\u770b\u5230\uff0c\u572810.59\u79d2\u7684\u65f6\u95f4\u91cc\uff0c\u751f\u62102347M\u7684\u4e00\u4e2a\u6587\u4ef6\uff0cIO\u5199\u7684\u901f\u5ea6\u7ea6\u4e3a221.6MB\/sec;<\/p>\n
\u5f53\u7136\u8fd9\u4e2a\u901f\u5ea6\u53ef\u4ee5\u591a\u6d4b\u8bd5\u51e0\u904d\u53d6\u4e00\u4e2a\u5e73\u5747\u503c\uff0c\u7b26\u5408\u6982\u7387\u7edf\u8ba1.<\/p>\n
b.\u6d4b\u8bd5\u78c1\u76d8\u7684IO\u8bfb\u901f\u5ea6<\/p>\n
# df -m<\/p>\n
Filesystem 1M-blocks Used Available Use% Mounted on<\/p>\n
\/dev\/mapper\/VolGroup00-LogVol00<\/p>\n
19214 9545 8693 53% \/<\/p>\n
\/dev\/sda1 99 13 82 14% \/boot<\/p>\n
none 506 0 506 0% \/dev\/shm<\/p>\n
# time dd if=\/dev\/mapper\/VolGroup00-LogVol00 of=\/dev\/null bs=8k<\/p>\n
2498560+0 records in<\/p>\n
2498560+0 records out<\/p>\n
247.99s real 1.92s user 48.64s system<\/p>\n
\u4e0a\u9762\u7684\u8bd5\u9a8c\u5728247.99\u79d2\u7684\u65f6\u95f4\u91cc\u8bfb\u53d6\u4e8619214MB\u7684\u6587\u4ef6\uff0c\u8ba1\u7b97\u4e0b\u6765\u5e73\u5747\u901f\u5ea6\u4e3a77.48MB\/sec<\/p>\n
c.\u6d4b\u8bd5IO\u540c\u65f6\u8bfb\u548c\u5199\u7684\u901f\u5ea6<\/p>\n
# time dd if=\/dev\/sda1 of=test.dbf bs=8k<\/p>\n
13048+1 records in<\/p>\n
13048+1 records out<\/p>\n
3.73s real 0.04s user 2.39s system<\/p>\n
# du -sm test.dbf<\/p>\n
103 test.dbf<\/p>\n
\u4e0a\u9762\u6d4b\u8bd5\u7684\u6570\u636e\u91cf\u6bd4\u8f83\u5c0f\uff0c\u4ec5\u4f5c\u4e3a\u53c2\u8003.<\/p>\n
\u76f8\u6bd4\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n
\u524d\u8005\u662flinux\u4e0a\u4e13\u4e1a\u7684\u6d4b\u8bd5IDE\/ATA\u78c1\u76d8\u7684\u5de5\u5177\uff0c\u4f46\u662f\u4f7f\u7528\u8303\u56f4\u6709\u5c40\u9650\u6027;(\u6b64\u8bd5\u9a8c\u4ec5\u4ec5\u4f7f\u7528\u4e86\u6d4b\u8bd5\u78c1\u76d8IO\u7684\u53c2\u6570\uff0c\u5bf9\u4e8e\u5176\u4ed6\u53c2\u6570\u53ca\u89e3\u91ca\u53c2\u8003man\u624b\u518c)<\/p>\n
\u540e\u8005\u53ef\u4ee5\u901a\u7528\uff0c\u4f46\u4e0d\u591f\u4e13\u4e1a\uff0c\u4e5f\u6ca1\u6709\u8003\u8651\u5230\u7f13\u5b58\u548c\u7269\u7406\u8bfb\u7684\u533a\u5206\uff0c\u6d4b\u8bd5\u7684\u6570\u636e\u4e5f\u662f\u4ec5\u4f5c\u53c2\u8003\uff0c\u4e0d\u80fd\u7b97\u662f\u6743\u5a01\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6709\u65f6\u5019\u6211\u4eec\u5728\u505a\u7ef4\u62a4\u7684\u65f6\u5019\uff0c\u603b\u4f1a\u9047\u5230\u7c7b\u4f3c\u4e8eIO\u7279\u522b\u9ad8\uff0c\u4f46\u4e0d\u80fd\u5224\u5b9a\u662fIO\u74f6\u9888\u8fd8\u662f\u8f6f\u4ef6\u53c2\u6570\u8bbe\u7f6e\u4e0d\u5f53\u5bfc\u81f4\u70ed\u76d8\u7684\u95ee\u9898.\u8fd9\u65f6\u5019\u901a\u5e38\u5e0c\u671b\u80fd\u77e5\u9053\u78c1\u76d8\u7684\u8bfb\u5199\u901f\u5ea6\uff0c\u6765\u8fdb\u884c\u4e0b\u4e00\u6b65\u7684\u51b3\u7b56\u3002 \u4e0b\u9762\u662f\u4e24\u79cd\u6d4b\u8bd5\u65b9\u6cd5\uff1a (1)\u4f7f\u7528hdparm\u547d\u4ee4 \u8fd9\u662f\u4e00\u4e2a\u662f\u7528\u6765\u83b7\u53d6ATA…<\/p>\n","protected":false},"author":126,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[4572,3896,4411],"topic":[],"class_list":["post-3105","post","type-post","status-publish","format-standard","hentry","category-tech","tag-IO","tag-linux","tag-cipan"],"_links":{"self":[{"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/posts\/3105"}],"collection":[{"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/users\/126"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/comments?post=3105"}],"version-history":[{"count":0,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/posts\/3105\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/media?parent=3105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/categories?post=3105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/tags?post=3105"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.homejamesfinance.com\/wp-json\/wp\/v2\/topic?post=3105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}精品国产午夜肉伦伦影院,双性老师灌满浓jing上课h,天天做天天爱夜夜爽,攵女乱h边做边走