{"id":7849,"date":"2019-11-17T19:20:31","date_gmt":"2019-11-18T03:20:31","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=7849"},"modified":"2025-06-13T20:19:31","modified_gmt":"2025-06-14T03:19:31","slug":"utilizing-multiple-disks-to-speed-up-couchbase-analytics-queries","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/ko\/utilizing-multiple-disks-to-speed-up-couchbase-analytics-queries\/","title":{"rendered":"\ub2e4\uc911 \ub514\uc2a4\ud06c\ub97c \uc0ac\uc6a9\ud558\uc5ec \uce74\uc6b0\uce58\ubca0\uc774\uc2a4 \uc560\ub110\ub9ac\ud2f1\uc2a4 \ucffc\ub9ac \uc18d\ub3c4 \ub192\uc774\uae30"},"content":{"rendered":"

\uc77c\ubc18\uc801\uc778 \uc560\ub4dc\ud639 \ubd84\uc11d \ucffc\ub9ac\ub294 \uba54\ubaa8\ub9ac\uc5d0 \ub4e4\uc5b4\uac08 \uc218 \uc788\ub294 \uac83\ubcf4\ub2e4 \ud6e8\uc52c \ub354 \ub9ce\uc740 \ub370\uc774\ud130\ub97c \ucc98\ub9ac\ud574\uc57c \ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc774\ub7ec\ud55c \ucffc\ub9ac\ub294 I\/O \ubc14\uc778\ub529\uc774 \ub418\ub294 \uacbd\ud5a5\uc774 \uc788\uc2b5\ub2c8\ub2e4. Couchbase 6.0\uc5d0 \ubd84\uc11d \uc11c\ube44\uc2a4\uac00 \ub3c4\uc785\ub418\uc5c8\uc744 \ub54c, \uc0ac\uc6a9\uc790\ub294 \ub178\ub4dc \ucd08\uae30\ud654 \uc911\uc5d0 \uc5ec\ub7ec \uac1c\uc758 \"\ubd84\uc11d \ub514\uc2a4\ud06c \uacbd\ub85c\"\ub97c \uc9c0\uc815\ud560 \uc218 \uc788\uc5c8\uc2b5\ub2c8\ub2e4. \uc774 \ubb38\uc11c\uc5d0\uc11c\ub294 \ud074\ub77c\uc6b0\ub4dc\uc758 \uc5ec\ub7ec \uc778\uc2a4\ud134\uc2a4\uc5d0\uc11c \uba87 \uac00\uc9c0 \uc2e4\ud5d8\uc744 \uc218\ud589\ud558\uc5ec \uc5ec\ub7ec \uac1c\uc758 \"Analytics \ub514\uc2a4\ud06c \uacbd\ub85c\"\ub97c \uc62c\ubc14\ub974\uac8c \uc124\uc815\ud558\ub294 \ubc29\ubc95\uacfc \uc774 \uae30\ub2a5\uc744 \ud65c\uc6a9\ud558\uc5ec Analytics \ucffc\ub9ac \uc18d\ub3c4\ub97c \ub192\uc774\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n

\"Figure
\n\uadf8\ub9bc 1: \ub178\ub4dc \ucd08\uae30\ud654 \uc911 Analytics \ub514\uc2a4\ud06c \uacbd\ub85c \uc9c0\uc815\ud558\uae30<\/p>\n

\ub178\ub4dc\ub97c \ucd08\uae30\ud654\ud558\ub294 \ub3d9\uc548 \uc774 \uacbd\ub85c\uac00 \uc788\ub294 \uc2e4\uc81c \ubb3c\ub9ac\uc801 \uc800\uc7a5 \uc7a5\uce58\uc5d0 \uad00\uacc4\uc5c6\uc774 \ubaa8\ub4e0 \uace0\uc720 \ud30c\uc77c \uc2dc\uc2a4\ud15c \uacbd\ub85c\ub97c '\uc560\ub110\ub9ac\ud2f1\uc2a4 \ub514\uc2a4\ud06c \uacbd\ub85c'\ub85c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub3d9\uc77c\ud55c \uc7a5\uce58\uc5d0 \uc788\ub294 \uc5ec\ub7ec \uacbd\ub85c\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc560\ub110\ub9ac\ud2f1\uc2a4 \uc11c\ube44\uc2a4\uc758 \ub370\uc774\ud130\ub294 \uc560\ub110\ub9ac\ud2f1\uc2a4 \uc11c\ube44\uc2a4\uac00 \uc788\ub294 \ubaa8\ub4e0 \ub178\ub4dc\uc5d0\uc11c \uc9c0\uc815\ub41c \ubaa8\ub4e0 \"\uc560\ub110\ub9ac\ud2f1\uc2a4 \ub514\uc2a4\ud06c \uacbd\ub85c\"\uc5d0 \uac78\uccd0 \ubd84\ud560\ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ud074\ub7ec\uc2a4\ud130\uc5d0 \uc560\ub110\ub9ac\ud2f1\uc2a4 \uc11c\ube44\uc2a4\uac00 \uc788\ub294 \ub178\ub4dc\uac00 2\uac1c \uc788\uace0 \ub178\ub4dc \uc911 \ud558\ub098\uc5d0 4\uac1c\uc758 '\uc560\ub110\ub9ac\ud2f1\uc2a4 \ub514\uc2a4\ud06c \uacbd\ub85c'\uac00 \uc9c0\uc815\ub418\uc5b4 \uc788\uace0 \ub2e4\ub978 \ub178\ub4dc\uc5d0 8\uac1c\uc758 '\uc560\ub110\ub9ac\ud2f1\uc2a4 \ub514\uc2a4\ud06c \uacbd\ub85c'\uac00 \uc788\ub294 \uacbd\uc6b0 \uc560\ub110\ub9ac\ud2f1\uc2a4\uc5d0\uc11c \uc0dd\uc131\ub41c \ubaa8\ub4e0 \ub370\uc774\ud130 \uc138\ud2b8\ub294 \ucd1d 12\uac1c\uc758 \ud30c\ud2f0\uc158(\ub370\uc774\ud130 \ud30c\ud2f0\uc158)\uc744 \uac16\uac8c \ub429\ub2c8\ub2e4.<\/span><\/p>\n

\ucffc\ub9ac \uc2e4\ud589 \uc911\uc5d0 Analytics\uc758 MPP \ucffc\ub9ac \uc5d4\uc9c4\uc740 \ubaa8\ub4e0 \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc5d0\uc11c \ub370\uc774\ud130\ub97c \ub3d9\uc2dc\uc5d0 \uc77d\uace0 \ucc98\ub9ac\ud558\ub824\uace0 \uc2dc\ub3c4\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \uac01 \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc774 \uc0c1\uc8fc\ud558\ub294 \uc2e4\uc81c \ubb3c\ub9ac\uc801 \ub514\uc2a4\ud06c\uc758 \ucd08\ub2f9 \uc785\ucd9c\ub825 \uc791\uc5c5 \uc218(IOPS)\uac00 \ucffc\ub9ac \uc2e4\ud589 \uc2dc\uac04\uc744 \uacb0\uc815\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4.<\/span><\/p>\n

SSD\uc640 \uac19\uc740 \ucd5c\uc2e0 \uc800\uc7a5 \uc7a5\uce58\ub294 HDD\ubcf4\ub2e4 \ud6e8\uc52c \ub192\uc740 IOPS\ub97c \uac00\uc9c0\uba70 \ub3d9\uc2dc \uc77d\uae30\ub97c \ub354 \uc798 \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c IOPS\uac00 \ub192\uc740 \uc7a5\uce58\uc5d0 \ub2e8\uc77c \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc744 \uc0ac\uc6a9\ud558\uba74 \ud574\ub2f9 \uae30\ub2a5\uc744 \ucda9\ubd84\ud788 \ud65c\uc6a9\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \ud558\ub098\uc758 \ucd5c\uc2e0 \uc800\uc7a5 \uc7a5\uce58\ub97c \uc0ac\uc6a9\ud558\ub294 \ub178\ub4dc\uc758 \uc77c\ubc18\uc801\uc778 \uacbd\uc6b0 \uc124\uc815\uc744 \uac04\uc18c\ud654\ud558\uae30 \uc704\ud574, \ub178\ub4dc \ucd08\uae30\ud654 \uc911\uc5d0 \ud558\ub098\uc758 \"Analytics \ub514\uc2a4\ud06c \uacbd\ub85c\"\ub9cc \uc9c0\uc815\ud558\ub294 \uacbd\uc6b0\uc5d0\ub9cc Analytics \uc11c\ube44\uc2a4\uac00 \ub3d9\uc77c\ud55c \uc800\uc7a5 \uc7a5\uce58 \ub0b4\uc5d0 \uc5ec\ub7ec \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc744 \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ub418\ub294 \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc758 \uc218\ub294 \uc774 \uacf5\uc2dd\uc5d0 \ub530\ub77c \uacb0\uc815\ub429\ub2c8\ub2e4:<\/span><\/p>\n

Maximum partitions to create = Min((Analytics Memory in MB \/ 1024), 16)\r\nActual created partitions = Min(node virtual cores, Maximum partitions to create)<\/pre>\n
\uc608\ub97c \ub4e4\uc5b4 \ub178\ub4dc\uc5d0 \uac00\uc0c1 \ucf54\uc5b4\uac00 8\uac1c \uc788\uace0 \ubd84\uc11d \uc11c\ube44\uc2a4\uac00 8GB \uc774\uc0c1\uc758 \uba54\ubaa8\ub9ac\ub85c \uad6c\uc131\ub41c \uacbd\uc6b0, \ud574\ub2f9 \ub178\ub4dc\uc5d0 8\uac1c\uc758 \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc774 \uc0dd\uc131\ub429\ub2c8\ub2e4. \ub9c8\ucc2c\uac00\uc9c0\ub85c \ub178\ub4dc\uc5d0 32\uac1c\uc758 \uac00\uc0c1 \ucf54\uc5b4\uac00 \uc788\uace0 \uba54\ubaa8\ub9ac\uac00 16GB \uc774\uc0c1\uc73c\ub85c \uad6c\uc131\ub41c \uacbd\uc6b0, \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ub418\ub294 \ucd5c\ub300 \ud30c\ud2f0\uc158\uc758 \uc0c1\ud55c\uc774 16\uac1c\uc774\ubbc0\ub85c 16\uac1c\uc758 \ud30c\ud2f0\uc158\ub9cc \uc0dd\uc131\ub429\ub2c8\ub2e4.<\/span><\/p>\n
\ub514\uc2a4\ud06c\ub2f9 \ub370\uc774\ud130 \ud30c\ud2f0\uc158 \uc218\uc5d0 \ub300\ud55c \uc131\ub2a5 \uc601\ud5a5\uc744 \ubcf4\uc5ec\uc8fc\uae30 \uc704\ud574 Amazon Web Services EC2\uc758 \ub2e4\uc591\ud55c \uc778\uc2a4\ud134\uc2a4 \uc720\ud615\uc5d0 \ub300\ud574 \ub2e4\uc74c\uc744 \uc0ac\uc6a9\ud558\uc5ec \uba87 \uac00\uc9c0 \uc2e4\ud5d8\uc744 \uc218\ud589\ud588\uc2b5\ub2c8\ub2e4. <\/span>\uce74\uc6b0\uce58\ubca0\uc774\uc2a4 \uc11c\ubc84 6.5 \ubca0\ud0c0 2<\/span><\/a>. \uc2e4\ud5d8\uc5d0 \uc0ac\uc6a9\ub41c \ub370\uc774\ud130\ub294 \uc720\uba85\ud55c \ub370\uc774\ud130\uc758 JSON\ud654\ub41c \ubc84\uc804\uc785\ub2c8\ub2e4. <\/span>TPC-DS<\/span><\/a> \ub370\uc774\ud130 \uc138\ud2b8\uc5d0\uc11c \ubaa8\ub4e0 \ud589\uc774 \ubb38\uc11c\uac00 \uc18d\ud55c \ud14c\uc774\ube14\uc758 \uc774\ub984\uc744 \uc2dd\ubcc4\ud558\ub294 \ucd94\uac00 \ud544\ub4dc\uac00 \uc788\ub294 JSON \ubb38\uc11c\ub85c \ubcc0\ud658\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc0d8\ud50c TPC-DS \ub370\uc774\ud130\uac00 \uc0dd\uc131\ub418\uc5b4 \ub2e4\uc74c\uacfc \uac19\uc740 \ubc84\ud0b7\uc5d0 \ub85c\ub4dc\ub418\uc5c8\uc2b5\ub2c8\ub2e4. tpcds<\/em>. \ub450 \uc2e4\ud5d8 \ubaa8\ub450\uc5d0\uc11c Analytics \uc11c\ube44\uc2a4\uc5d0\ub294 32GB\uc758 \uba54\ubaa8\ub9ac\uac00 \ud560\ub2f9\ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
\uc2e4\ud5d8 1: 8\uac1c\uc758 \uac00\uc0c1 \ucf54\uc5b4\uc640 1\uac1c\uc758 NVMe SSD\ub97c \uc0ac\uc6a9\ud558\ub294 \ub2e8\uc77c \uc778\uc2a4\ud134\uc2a4<\/b><\/p>\n
\uc774 \uc2e4\ud5d8\uc5d0\uc11c\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc560\ub110\ub9ac\ud2f1\uc2a4 \uc11c\ube44\uc2a4\uc5d0\uc11c 3\uac1c\uc758 \ub370\uc774\ud130 \uc138\ud2b8\ub97c \uc0dd\uc131\ud588\uc2b5\ub2c8\ub2e4:\u00a0<\/span><\/p>\n
CREATE DATASET store_sales ON tpcds WHERE table_name='store_sales';\r\nCREATE DATASET date_dim ON tpcds WHERE table_name='date_dim';\r\nCREATE DATASET item ON tpcds WHERE table_name='item';<\/pre>\n
\ub450 \uac00\uc9c0 \ub2e4\ub978 \uad6c\uc131\uc5d0\uc11c \uc751\ub2f5 \uc2dc\uac04\uc744 \uce21\uc815\ud558\uae30 \uc704\ud574 \ub2e4\uc74c TPC-DS \uc790\uaca9 \uc99d\uba85 \ucffc\ub9ac\ub97c N1QL for Analytics \ucffc\ub9ac\ub85c \ubcc0\ud658\ud55c \ud6c4 \uc0ac\uc6a9\ud588\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n
SELECT dt.d_year,\r\n       item.i_brand_id brand_id,\r\n       item.i_brand brand,\r\n       sum(ss.ss_ext_sales_price) sum_agg\r\nFROM date_dim dt,\r\n     store_sales ss,\r\n     item\r\nWHERE dt.d_date_sk = ss.ss_sold_date_sk\r\n  AND ss.ss_item_sk = item.i_item_sk\r\n  AND item.i_manufact_id = 128\r\n  AND dt.d_moy=11\r\nGROUP BY dt.d_year,\r\n         item.i_brand,\r\n         item.i_brand_id\r\nORDER BY dt.d_year,\r\n         sum_agg DESC,\r\n         brand_id\r\nLIMIT 100;<\/pre>\n
\uccab \ubc88\uc9f8 \uad6c\uc131\uc5d0\uc11c\ub294 \ub3d9\uc77c\ud55c \ub514\uc2a4\ud06c\uc5d0 \ub450 \uac1c\uc758 \"\ubd84\uc11d \ub514\uc2a4\ud06c \uacbd\ub85c\"\ub97c \uc9c0\uc815\ud558\uc5ec \uac01 \ub370\uc774\ud130 \uc138\ud2b8\uc5d0 2\uac1c\uc758 \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc774 \uc0dd\uacbc\uc2b5\ub2c8\ub2e4. \ub450 \ubc88\uc9f8 \uad6c\uc131\uc5d0\uc11c\ub294 \ud558\ub098\uc758 \"\uc560\ub110\ub9ac\ud2f1\uc2a4 \ub370\uc774\ud130<\/a> \uacbd\ub85c\"\ub97c \uc9c0\uc815\ud558\uba74 \uc790\ub3d9 \uad6c\uc131 \uc635\uc158\uc774 \ud2b8\ub9ac\uac70\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \ub178\ub4dc\uc5d0\ub294 8\uac1c\uc758 \uac00\uc0c1 \ucf54\uc5b4\uac00 \uc788\uc73c\ubbc0\ub85c 8\uac1c\uc758 \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc774 \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc544\ub798 \uadf8\ub9bc 2\ub294 \uc774 \ub450 \uac00\uc9c0 \uad6c\uc131\uc758 \ud3c9\uade0 \ucffc\ub9ac \uc751\ub2f5 \uc2dc\uac04\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4. \ud3c9\uade0 \ucffc\ub9ac \uc751\ub2f5 \uc2dc\uac04 \uce21\uba74\uc5d0\uc11c \ubcf4\uba74, \ud30c\ud2f0\uc158\uc774 8\uac1c\uc778 \uc790\ub3d9 \uad6c\uc131\uc774 \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc774 2\uac1c\uc778 \uad6c\uc131\ubcf4\ub2e4 2\ubc30 \uc774\uc0c1 \ube68\ub790\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uac1c\uc120\uc740 \uc774\ub7ec\ud55c \uc720\ud615\uc758 \ub514\uc2a4\ud06c\ub294 8\uac1c\uc758 \ub3d9\uc2dc \uc77d\uae30\ub97c \ucc98\ub9ac\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\uc5d0 \ub2e8\uc77c NVMe SSD\uc758 \ud65c\uc6a9\ub3c4\uac00 \ub354 \ub192\uc558\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \ub610\ud55c \uc774 \ucffc\ub9ac\uc5d0\ub294 \uadf8\ub8f9\ud654 \ubc0f \uc815\ub82c\uc774 \ud3ec\ud568\ub418\ubbc0\ub85c 8\uac1c \ud30c\ud2f0\uc158\uc5d0\uc11c \ub3d9\uc2dc\uc5d0 \ub370\uc774\ud130\ub97c \ucc98\ub9ac\ud558\uba74 \ucffc\ub9ac \uc131\ub2a5\uc774 \ud06c\uac8c \ud5a5\uc0c1\ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
\"Figure
\n\uadf8\ub9bc 2: \uc2e4\ud5d8 1 \ud3c9\uade0 \ucffc\ub9ac \uc751\ub2f5 \uc2dc\uac04<\/p>\n
\uc2e4\ud5d8 2: 8\uac1c\uc758 \uac00\uc0c1 \ucf54\uc5b4\uc640 6\uac1c\uc758 HDD\ub97c \uc0ac\uc6a9\ud558\ub294 \ub2e8\uc77c \uc778\uc2a4\ud134\uc2a4<\/b><\/p>\n
\uc774 \uc2e4\ud5d8\uc5d0\uc11c\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 tpcds \ubc84\ud0b7\uc5d0 \uc788\ub294 \ubaa8\ub4e0 \ub370\uc774\ud130\ub97c \ud3ec\ud568\ud558\ub294 \ub2e8\uc77c \ub370\uc774\ud130 \uc138\ud2b8\ub97c \uc0dd\uc131\ud558\uc5ec \ub354 \ud070 \uc6a9\ub7c9\uc758 \ub370\uc774\ud130\ub97c \uc2a4\uce94\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n
CREATE DATASET tpcds on tpcds;<\/pre>\n
\ub450 \uac00\uc9c0 \ub2e4\ub978 \uad6c\uc131\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubaa8\ub4e0 \ub370\uc774\ud130\ub97c \uc2a4\uce94\ud558\ub294 \ub2e4\uc74c N1QL for Analytics \ucffc\ub9ac\ub97c \uc0ac\uc6a9\ud588\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n
SELECT SUM(ss_ext_sales_price)\r\nFROM tpcds\r\nWHERE table_name = \"store_sales\";<\/pre>\n
\uccab \ubc88\uc9f8 \uad6c\uc131\uc758 \uacbd\uc6b0, \ub2e8\uc77c \"\ubd84\uc11d \ub370\uc774\ud130 \uacbd\ub85c\"\uac00 \uc9c0\uc815\ub418\uc5c8\uc73c\uba70, \uadf8 \uacb0\uacfc \uc2dc\uc2a4\ud15c\uc774 \uc790\ub3d9\uc73c\ub85c <\/span>\ub2e8\uc77c<\/span><\/i> HDD. \ub450 \ubc88\uc9f8 \uad6c\uc131\uc5d0\uc11c\ub294 6\uac1c\uc758 '\ubd84\uc11d \ub370\uc774\ud130 \uacbd\ub85c'\ub97c \uc9c0\uc815\ud558\uace0 \uac01 \uacbd\ub85c\ub97c \uc11c\ub85c \ub2e4\ub978 \ubb3c\ub9ac\uc801 HDD\uc5d0 \ubc30\uce58\ud558\uc5ec 6\uac1c\uc758 \ub370\uc774\ud130 \ud30c\ud2f0\uc158\uc744 \ub9cc\ub4e4\uc5c8\uc2b5\ub2c8\ub2e4. \uc544\ub798 \uadf8\ub9bc 3\uc740 \ub450 \uad6c\uc131\uc758 \ud3c9\uade0 \ucffc\ub9ac \uc751\ub2f5 \uc2dc\uac04\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4. \uccab \ubc88\uc9f8 \uad6c\uc131\uc5d0\uc11c\ub294 \ub2e8\uc77c HDD\uc5d0\uc11c 8\uac1c\uc758 \ub3d9\uc2dc \uc77d\uae30\ub97c \uc218\ud589\ud55c \uacb0\uacfc \uc131\ub2a5\uc774 \uc800\ud558\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uadf8 \uc8fc\ub41c \uc774\uc720\ub294 \ub098\uba38\uc9c0 5\uac1c HDD\uc758 I\/O \ub300\uc5ed\ud3ed\uc774 \uc0ac\uc6a9\ub418\uc9c0 \uc54a\uc558\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \ub610\ud55c \ub2e8\uc77c HDD\uc5d0 \ub300\ud55c 8\ubc29\ud5a5 \ub3d9\uc2dc \uc77d\uae30\ub294 \ub354 \ub9ce\uc740 \ub514\uc2a4\ud06c \uc554 \uc774\ub3d9\uc73c\ub85c \uc774\uc5b4\uc838 \ub514\uc2a4\ud06c I\/O\uc758 \ud3c9\uade0 \ube44\uc6a9\uc744 \uc99d\uac00\uc2dc\ucf30\uc2b5\ub2c8\ub2e4.  6\uac1c\uc758 HDD\ub97c \ubaa8\ub450 \ub3d9\uc2dc\uc5d0 \ud65c\uc6a9\ud558\ub294 \ub450 \ubc88\uc9f8 \uad6c\uc131\uc740 \uacb0\uacfc\uc801\uc73c\ub85c 7\ubc30 \uc774\uc0c1\uc758 \uc131\ub2a5 \ud5a5\uc0c1\uc744 \uac00\uc838\uc654\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
\"Figure
\n\uadf8\ub9bc 3: \uc2e4\ud5d8 2 \ud3c9\uade0 \ucffc\ub9ac \uc751\ub2f5 \uc2dc\uac04<\/p>\n
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\n\ubd84\uc11d \uc5d4\uc9c4\uc740 30\ub144 \uc774\uc0c1\uc758 \uad00\uacc4\ud615 MPP R&D\uc5d0\uc11c \ub3c4\ucd9c\ub41c \"\ub3d9\uae09 \ucd5c\uac15\uc758\" \uc54c\uace0\ub9ac\uc998\uc744 \uae30\ubc18\uc73c\ub85c \ubcd1\ub82c \uc870\uc778, \uc9d1\uacc4 \ubc0f \uc815\ub82c\uc744 \uc9c0\uc6d0\ud558\ub294 \ubcf8\uaca9\uc801\uc778 \ubcd1\ub82c \ucffc\ub9ac \ud504\ub85c\uc138\uc11c\uc774\uc9c0\ub9cc JSON \ub370\uc774\ud130\uc6a9\uc785\ub2c8\ub2e4. \ub450 \uac00\uc9c0 \uc2e4\ud5d8\uc744 \ud1b5\ud574 '\ubd84\uc11d \ub514\uc2a4\ud06c \uacbd\ub85c'\ub97c \uad6c\uc131\ud560 \ub54c \uc11c\ub85c \ub2e4\ub978 \uc120\ud0dd\uc744 \ud560 \ub54c \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uc0c1\ub2f9\ud55c \uc131\ub2a5 \uc601\ud5a5\uc744 \ubcf4\uc5ec\uc8fc\uc5c8\uc2b5\ub2c8\ub2e4. \ub610\ud55c, \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uacbd\uc6b0 \uc5ec\ub7ec \uac1c\uc758 \ubb3c\ub9ac\uc801 \ub514\uc2a4\ud06c\ub97c \ud65c\uc6a9\ud558\uc5ec \ubd84\uc11d \uc5d4\uc9c4\uc774 \ubd84\uc11d \ucffc\ub9ac \uc18d\ub3c4\ub97c \ud06c\uac8c \ub192\uc77c \uc218 \uc788\ub294 \ubc29\ubc95\ub3c4 \uc2dc\uc5f0\ud588\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n
 <\/p>","protected":false},"excerpt":{"rendered":"
Typical ad-hoc analytical queries have to process much more data than can fit in memory. Consequently, those queries tend to be I\/O bound. 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