{"id":1690,"date":"2016-11-14T08:37:20","date_gmt":"2016-11-14T14:37:20","guid":{"rendered":"http:\/\/blografia.net\/vicm3\/?p=1690"},"modified":"2016-11-14T13:07:48","modified_gmt":"2016-11-14T19:07:48","slug":"azure-quirks","status":"publish","type":"post","link":"https:\/\/blografia.net\/vicm3\/2016\/11\/azure-quirks\/","title":{"rendered":"Azure quirks"},"content":{"rendered":"<pre>[root@foo html]# time cp src31\/ leiyp -a\r\nreal    3m33.343s\r\nuser    0m0.447s\r\nsys     0m5.144s\r\n[root@foo html]# time cp src31\/ lep -a\r\n\r\nreal    0m14.093s\r\nuser    0m0.320s\r\nsys     0m4.000s\r\n[root@foo html]# time cp src31\/ les -a\r\n\r\nreal    0m7.885s\r\nuser    0m0.339s\r\nsys     0m4.237s\r\n[root@foo html]# time cp src31\/ lems -a\r\n\r\nreal    0m9.902s\r\nuser    0m0.324s\r\nsys     0m4.320s\r\n[root@foo html]# du -sh src31\/\r\n517M    src31\/\r\n<\/pre>\n<p>First copy took ages&#8230; and then things go fast&#8230;<\/p>\n<p>Well the disk don&#8217;t behave like on a normal system<\/p>\n<pre>[root@foo ~]# df -h\r\nFilesystem      Size  Used Avail Use% Mounted on\r\n\/dev\/sda1        29G  9.0G   19G  34% \/\r\ntmpfs            14G     0   14G   0% \/dev\/shm\r\n\/dev\/md127       79G   21G   55G  27% \/var\/lib\/mysql\r\n\/dev\/sdc1        99G   66G   28G  71% \/var\/www\r\n\/dev\/sdb1       197G   60M  187G   1% \/mnt\/resource\r\n[root@foo ~]# hdparm -tT \/dev\/sda1\r\n\r\n\/dev\/sda1:\r\n Timing cached reads:   12396 MB in  1.99 seconds = 6229.11 MB\/sec\r\n Timing buffered disk reads:  38 MB in  3.06 seconds =  12.41 MB\/sec\r\n[root@foo ~]# hdparm -tT \/dev\/sdc1\r\n\r\n\/dev\/sdc1:\r\n Timing cached reads:   12002 MB in  1.98 seconds = 6046.37 MB\/sec\r\n Timing buffered disk reads:   8 MB in  3.90 seconds =   2.05 MB\/sec\r\n[root@foo ~]# hdparm -tT \/dev\/md127\r\n\r\n\/dev\/md127:\r\n Timing cached reads:   11688 MB in  1.99 seconds = 5868.12 MB\/sec\r\n Timing buffered disk reads: 170 MB in  3.02 seconds =  56.20 MB\/sec\r\n<\/pre>\n<p>Also system is not idle is on production but compared to a consumer SATA Seagate Barracuda 7200.14 (ST2000DM001-1ER164) I get this.<\/p>\n<pre> hdparm -tT \/dev\/sda\r\n\r\n\/dev\/sda:\r\n Timing cached reads:   37552 MB in  2.00 seconds = 18802.96 MB\/sec\r\n Timing buffered disk reads: 586 MB in  3.00 seconds = 195.07 MB\/sec\r\n<\/pre>\n<p>Also a production machine, but not that busy and sitting on my desktop, bummer<\/p>\n<p>A better comparison, a linode 8GB instance also a production one and busy:<\/p>\n<pre>\r\nroot@bar:~# hdparm -tT \/dev\/sda\r\n\r\n\/dev\/sda:\r\n Timing cached reads:   14546 MB in  2.00 seconds = 7280.14 MB\/sec\r\n Timing buffered disk reads: 1940 MB in  3.00 seconds = 646.64 MB\/sec\r\n\r\nroot@bar:~# hdparm -tT \/dev\/sdd\r\n\r\n\/dev\/sdd:\r\n Timing cached reads:   14244 MB in  2.00 seconds = 7131.55 MB\/sec\r\n Timing buffered disk reads: 1074 MB in  3.01 seconds = 356.59 MB\/sec\r\n<\/pre>\n<p>Also to disclose this is not a slow entry VM is a\u00a0Standard D12 v1 (4 Cores, 28 GB memory) of Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[root@foo html]# time cp src31\/ leiyp -a real 3m33.343s user 0m0.447s sys 0m5.144s [root@foo html]# time cp src31\/ lep -a real 0m14.093s user 0m0.320s sys 0m4.000s [root@foo html]# time cp src31\/ les -a real 0m7.885s user 0m0.339s sys 0m4.237s [root@foo &hellip; <a href=\"https:\/\/blografia.net\/vicm3\/2016\/11\/azure-quirks\/\">Sigue leyendo <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[3,10,6],"tags":[667,685,403,679,683,682,681,680,684],"class_list":["post-1690","post","type-post","status-publish","format-standard","hentry","category-general","category-planetalinux","category-trabajo","tag-azure","tag-benchmark","tag-cli","tag-disks","tag-hdparm","tag-odd","tag-quirk","tag-speed","tag-test"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":616,"url":"https:\/\/blografia.net\/vicm3\/2009\/01\/ssd-segun-hdparm\/","url_meta":{"origin":1690,"position":0},"title":"El disco de la mini HP","author":"vicm3","date":"17 enero, 2009","format":false,"excerpt":"He estado jugando con la hp2133, y siento realmente lenta la unidad de estado solido de 4GB que viene de fabrica... con la cual obtengo los siguientes resultados. root@mini:~# hdparm -i \/dev\/sda \/dev\/sda: Model=SMI MODEL , FwRev=20080308, SerialNo=SMI 00000403 Config={ HardSect NotMFM Fixed DTR>10Mbs } RawCHS=7769\/16\/63, TrkSize=0, SectSize=576, ECCbytes=4 BuffType=DualPort,\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1789,"url":"https:\/\/blografia.net\/vicm3\/2017\/09\/en-el-limite\/","url_meta":{"origin":1690,"position":1},"title":"\u00bfEn el l\u00edmite?","author":"vicm3","date":"4 septiembre, 2017","format":false,"excerpt":"Recientemente me han estado llegando correos de DreamHost, donde hospedo mis sitios de que algunos servicios se han reiniciado, pero no tenia muy claro a que se podr\u00edan referir, especialmente porque hace referencia al uso de memoria: \u201cOur monitoring systems show that one (or some) of your user accounts may\u2026","rel":"","context":"En \u00abGeneral\u00bb","block_context":{"text":"General","link":"https:\/\/blografia.net\/vicm3\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":862,"url":"https:\/\/blografia.net\/vicm3\/2012\/03\/5900rpm-64mb-de-cache-green-seagate-st2000dl003\/","url_meta":{"origin":1690,"position":2},"title":"5900RPM 64MB de Cache \u00abGreen\u00bb Seagate ST2000DL003","author":"vicm3","date":"2 marzo, 2012","format":false,"excerpt":"root@leviatan:~# hdparm -t \/dev\/sdb \/dev\/sdb: Timing buffered disk reads: 438 MB in\u00a0 3.01 seconds = 145.43 MB\/sec root@leviatan:~# hdparm -T \/dev\/sdb \/dev\/sdb: Timing cached reads:\u00a0\u00a0 2222 MB in\u00a0 2.00 seconds = 1110.85 MB\/sec root@leviatan:~# hdparm -i \/dev\/sdb \/dev\/sdb: Model=ST2000DL003-9VT166, FwRev=CC3C, SerialNo=5YD6X342 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } RawCHS=16383\/16\/63,\u2026","rel":"","context":"En \u00abDebraye\u00bb","block_context":{"text":"Debraye","link":"https:\/\/blografia.net\/vicm3\/category\/debraye\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":619,"url":"https:\/\/blografia.net\/vicm3\/2009\/01\/hp-2133\/","url_meta":{"origin":1690,"position":3},"title":"HP 2133","author":"vicm3","date":"29 enero, 2009","format":false,"excerpt":"El SSD realmente es p\u00e9simo \/dev\/sda: Model=SMI MODEL , FwRev=20080308, SerialNo=SMI 00000403 Config={ HardSect NotMFM Fixed DTR>10Mbs } RawCHS=7769\/16\/63, TrkSize=0, SectSize=576, ECCbytes=4 BuffType=DualPort, BuffSize=1kB, MaxMultSect=1, MultSect=?0? CurCHS=7769\/16\/63, CurSects=7831152, LBA=yes, LBAsects=7831152 IORDY=no, tPIO={min:120,w\/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":871,"url":"https:\/\/blografia.net\/vicm3\/2012\/03\/y-bueno-a-quince-dias\/","url_meta":{"origin":1690,"position":4},"title":"Y bueno a quince d\u00edas","author":"vicm3","date":"10 marzo, 2012","format":false,"excerpt":"avalon:~$ df -h Filesystem Size Used Avail Use% Mounted on \/dev\/sda1 250M 122M 115M 52% \/ tmpfs 501M 0 501M 0% \/lib\/init\/rw udev 496M 140K 496M 1% \/dev tmpfs 501M 0 501M 0% \/dev\/shm \/dev\/sda8 285G 165G 106G 61% \/home \/dev\/sda7 361M 8.1M 334M 3% \/tmp \/dev\/sda5 4.6G 880M 3.5G\u2026","rel":"","context":"En \u00abEducaci\u00f3n\u00bb","block_context":{"text":"Educaci\u00f3n","link":"https:\/\/blografia.net\/vicm3\/category\/educacion\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/blografia.net\/vicm3\/wp-content\/uploads\/2012\/03\/avalon.smart_sdd-week.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":524,"url":"https:\/\/blografia.net\/vicm3\/2008\/02\/kernel-local-exploit\/","url_meta":{"origin":1690,"position":5},"title":"!Kernel local exploit!","author":"vicm3","date":"12 febrero, 2008","format":false,"excerpt":"Fue la gran noticia, el domingo y ayer... parece que sin embargo no ha sido noticia, que se arreglo como a las 36 horas. (Se que lo han hecho tambien en RH, SUSE y otros, pero actualmente ya no tengo en producci\u00f3n ningun RH, al menos a mi cargo), pero\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/posts\/1690","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/comments?post=1690"}],"version-history":[{"count":0,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/posts\/1690\/revisions"}],"wp:attachment":[{"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/media?parent=1690"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/categories?post=1690"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/tags?post=1690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}