{"id":8023,"date":"2026-04-02T12:33:40","date_gmt":"2026-04-02T03:33:40","guid":{"rendered":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/news\/8023"},"modified":"2026-04-02T12:33:40","modified_gmt":"2026-04-02T03:33:40","slug":"important-notice-regarding-the-use-of-the-issp-supercomputer","status":"publish","type":"news","link":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/en\/news\/8023","title":{"rendered":"Important Notice Regarding the Use of the ISSP Supercomputer"},"content":{"rendered":"<p data-start=\"21\" data-end=\"70\">Dear ISSP supercomputer users,<\/p>\r\n<p data-start=\"21\" data-end=\"70\"><\/p>\r\n<p data-start=\"21\" data-end=\"70\"><\/p>\r\n<p data-start=\"72\" data-end=\"140\">Thank you for your continued use of the ISSP Supercomputer System.<\/p>\r\n<p data-start=\"142\" data-end=\"265\">We would like to remind you of the security requirements and usage etiquette that must be followed when using the system.<\/p>\r\n<p data-start=\"267\" data-end=\"373\">As the following items affect the safety and usability for all users, we kindly ask for your compliance.<\/p>\r\n<hr data-start=\"375\" data-end=\"378\" \/>\r\n<h3 data-section-id=\"1hstsqk\" data-start=\"380\" data-end=\"405\">Security Requirements<\/h3>\r\n<ul data-start=\"407\" data-end=\"633\">\r\n\t<li data-section-id=\"1jizd32\" data-start=\"407\" data-end=\"483\">\u30fbDo not allow anyone other than the registered user to use your account.<\/li>\r\n\t<li data-section-id=\"wvtoa\" data-start=\"484\" data-end=\"531\">\u30fbDo not share your private key with others.<\/li>\r\n\t<li data-section-id=\"58ko00\" data-start=\"532\" data-end=\"584\">\u30fbDo not store private keys on the supercomputer.<\/li>\r\n\t<li data-section-id=\"1wn4wfy\" data-start=\"585\" data-end=\"633\">\u30fbProtect your private key with a passphrase.<\/li>\r\n<\/ul>\r\n<hr data-start=\"635\" data-end=\"638\" \/>\r\n<h3 data-section-id=\"1u2111z\" data-start=\"640\" data-end=\"669\">Usage Etiquette and Notes<\/h3>\r\n<ol data-start=\"671\" data-end=\"2192\">\r\n\t<li data-section-id=\"o7vifj\" data-start=\"671\" data-end=\"913\">\r\n<p data-start=\"674\" data-end=\"717\"><strong data-start=\"674\" data-end=\"715\">Avoid heavy workloads on login nodes.<\/strong><\/p>\r\n<p data-start=\"722\" data-end=\"913\">Running many programs or parallel processes on login nodes may negatively impact other users.<br data-start=\"815\" data-end=\"818\" \/>\r\nPlease use debug queues such as <em data-start=\"853\" data-end=\"860\">i8cpu<\/em> or <em data-start=\"864\" data-end=\"871\">i1fat<\/em> for debugging and parallel compilation.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<p>&nbsp;<\/p>\r\n<ol data-start=\"671\" data-end=\"2192\">\r\n\t<li data-section-id=\"o7vifj\" data-start=\"671\" data-end=\"913\"><\/li>\r\n\t<li data-section-id=\"o7vifj\" data-start=\"671\" data-end=\"913\"><\/li>\r\n\t<li data-section-id=\"ts9xpa\" data-start=\"915\" data-end=\"1171\">\r\n<p data-start=\"918\" data-end=\"972\"><strong data-start=\"918\" data-end=\"970\">Avoid I\/O-intensive jobs in the \/home directory.<\/strong><\/p>\r\n<p data-start=\"977\" data-end=\"1171\">Jobs with frequent small file accesses in <code data-start=\"1019\" data-end=\"1026\">\/home<\/code> may degrade system performance for other users.<br data-start=\"1074\" data-end=\"1077\" \/>\r\nSuch jobs should be executed in the <code data-start=\"1116\" data-end=\"1123\">\/work<\/code> directory, which provides faster file access.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<p>&nbsp;<\/p>\r\n<ol data-start=\"671\" data-end=\"2192\">\r\n\t<li data-section-id=\"ts9xpa\" data-start=\"915\" data-end=\"1171\"><\/li>\r\n\t<li data-section-id=\"ts9xpa\" data-start=\"915\" data-end=\"1171\"><\/li>\r\n\t<li data-section-id=\"ts9xpa\" data-start=\"915\" data-end=\"1171\"><\/li>\r\n\t<li data-section-id=\"ts9xpa\" data-start=\"915\" data-end=\"1171\"><\/li>\r\n\t<li data-section-id=\"59u8ro\" data-start=\"1173\" data-end=\"1516\">\r\n<p data-start=\"1176\" data-end=\"1224\"><strong data-start=\"1176\" data-end=\"1222\">Automatic deletion in the \/work directory.<\/strong><\/p>\r\n<p data-start=\"1229\" data-end=\"1415\">In System B (ohtaka), files under <code data-start=\"1263\" data-end=\"1270\">\/work<\/code> that have not been accessed for approximately 4 weeks,<br data-start=\"1325\" data-end=\"1328\" \/>\r\nand in System C (kugui), for approximately 2 weeks, will be automatically deleted.<\/p>\r\n<p data-start=\"1420\" data-end=\"1516\">Users generating large numbers of files are requested to delete unnecessary files proactively.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<p>&nbsp;<\/p>\r\n<ol data-start=\"671\" data-end=\"2192\">\r\n\t<li data-section-id=\"59u8ro\" data-start=\"1173\" data-end=\"1516\"><\/li>\r\n\t<li data-section-id=\"59u8ro\" data-start=\"1173\" data-end=\"1516\"><\/li>\r\n\t<li data-section-id=\"175a4zw\" data-start=\"1518\" data-end=\"1833\">\r\n<p data-start=\"1521\" data-end=\"1572\"><strong data-start=\"1521\" data-end=\"1570\">Please help reduce the total number of files.<\/strong><\/p>\r\n<p data-start=\"1577\" data-end=\"1735\">Even small files can cause issues if their total number exceeds tens of millions, potentially reaching system-wide limits.<br data-start=\"1699\" data-end=\"1702\" \/>\r\nThis may affect other users.<\/p>\r\n<p data-start=\"1740\" data-end=\"1833\">Please reduce file counts by deleting unnecessary files or archiving them when appropriate.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<p>&nbsp;<\/p>\r\n<ol data-start=\"671\" data-end=\"2192\">\r\n\t<li data-section-id=\"175a4zw\" data-start=\"1518\" data-end=\"1833\"><\/li>\r\n\t<li data-section-id=\"175a4zw\" data-start=\"1518\" data-end=\"1833\"><\/li>\r\n\t<li data-section-id=\"xdqaln\" data-start=\"1835\" data-end=\"2192\">\r\n<p data-start=\"1838\" data-end=\"1873\"><strong data-start=\"1838\" data-end=\"1871\">Regarding the use of VS Code.<\/strong><\/p>\r\n<\/li>\r\n\t<li data-section-id=\"xdqaln\" data-start=\"1835\" data-end=\"2192\">\r\n<p data-start=\"1878\" data-end=\"2036\">When using the Remote-SSH extension, SSH connections may fail due to exceeding process limits,<br data-start=\"1972\" data-end=\"1975\" \/>\r\nas it spawns a large number of processes on login nodes.<\/p>\r\n<p data-start=\"2041\" data-end=\"2192\">Instead, the use of the SSH-FS extension (v1.26.0) is recommended.<br data-start=\"2107\" data-end=\"2110\" \/>\r\nPlease note that version 1.26.1 has been reported to cause connection errors.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<p>&nbsp;<\/p>\r\n<hr data-start=\"2194\" data-end=\"2197\" \/>\r\n<p data-start=\"2199\" data-end=\"2230\" data-is-last-node=\"\" data-is-only-node=\"\">Thank you for your cooperation.<\/p>\r\n<p><br \/>\r\n<br \/>\r\n\u7269\u6027\u7814\u7a76\u6240\u5927\u578b\u8a08\u7b97\u6a5f\u5ba4<br \/>\r\ncenter__at__issp.u-tokyo.ac.jp (__at__\u3092@\u306b\u3057\u3066\u4e0b\u3055\u3044\u3002)<\/p>","protected":false},"featured_media":0,"parent":0,"template":"","news-cat":[45],"class_list":["post-8023","news","type-news","status-publish","hentry","news-cat-system","en-US"],"acf":[],"_links":{"self":[{"href":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/wp-json\/wp\/v2\/news\/8023","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/wp-json\/wp\/v2\/types\/news"}],"version-history":[{"count":6,"href":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/wp-json\/wp\/v2\/news\/8023\/revisions"}],"predecessor-version":[{"id":8029,"href":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/wp-json\/wp\/v2\/news\/8023\/revisions\/8029"}],"wp:attachment":[{"href":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/wp-json\/wp\/v2\/media?parent=8023"}],"wp:term":[{"taxonomy":"news-cat","embeddable":true,"href":"https:\/\/mdcl.issp.u-tokyo.ac.jp\/scc\/wp-json\/wp\/v2\/news-cat?post=8023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}