Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1ubOYw-000Ihe-RU for pgsql-general@arkaria.postgresql.org; Mon, 14 Jul 2025 19:10:06 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1ubOXw-00Bx2V-ST for pgsql-general@arkaria.postgresql.org; Mon, 14 Jul 2025 19:09:05 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1ubOXw-00Bx2N-Hv for pgsql-general@lists.postgresql.org; Mon, 14 Jul 2025 19:09:05 +0000 Received: from mail-oo1-xc2d.google.com ([2607:f8b0:4864:20::c2d]) by makus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.96) (envelope-from ) id 1ubOXv-007HZf-1T for pgsql-general@lists.postgresql.org; Mon, 14 Jul 2025 19:09:04 +0000 Received: by mail-oo1-xc2d.google.com with SMTP id 006d021491bc7-613a6e39f52so1785902eaf.3 for ; Mon, 14 Jul 2025 12:09:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1752520142; x=1753124942; darn=lists.postgresql.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=X72p3Bc7XCmkmL1UxCBUoVzxiFa3d0K7NPnPgty7h4Y=; b=gWQ5p914+AO08/9p1f3I/6fJBtcuNtHHakhpo7TPwl2iH0CPUkQKyuzQeEZZ8ohX0o rny09Nhg8udZ8bELn82g/ZWZZMosZZ9G/bZcmB3lzA6k/R6J8wf9RE/OTXckbG+k8088 NDu9LXdAP7J8GI7CyApSOhHPkH6haZzZqge+K06vKrlmLOVeF/sC+cIZTWxVjn3ZGbYH So8+Z7HOc9W2rqQ44GYZyKM6Rky01AKJjBse5mzjg+lkowOCt5ZAlAl/LOCKpOsxR2nT huHCw0DXK0hUgp4A5yhnZ4+DInd36jwyuVDSXAZrgpxtCNLlTaQIkXl1/TJT0SwGhsp5 aFyQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752520142; x=1753124942; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=X72p3Bc7XCmkmL1UxCBUoVzxiFa3d0K7NPnPgty7h4Y=; b=QAe8/3JtbdDBv803l6DUjFW57yIcohawsHWwZGj7kbupM2FPZhgc7yxZKanSHGBEma r1v+6eiffMFxB53jQslYeASgyBd3WkUU5l0PeIxKT7/K+59cfZkbuQPwNhwf/wTkxeKQ ha5b1HIPUb6hwmEKi0FXz0hrU/fF305xMs08+YnBQnbY49y3WT/SsoK43D+gZUusMpJu oQJrXSuMPWdd2Y2/Orh8DIq3/hzZvYZ5aK2eq6YXCKl7W8MhCf8xcFX5+SB+hGc0Jw8j BaqTjr12M2JDYCyJod+tqpMW8zmSrk3hAWWuL2uld89NkAzwtWv+QMChwjxBoX8lf8rc SXQA== X-Forwarded-Encrypted: i=1; AJvYcCUu/KcantlbTS1mpEwFPQinaqX+ybcD4sATbLLOm7lShpl0YdpjbvVt9uJ0awCOA4FPwkseu0YtFWaIkpDy@lists.postgresql.org X-Gm-Message-State: AOJu0Ywcj08IJd1OB8Buz7+MVrFWojp+zXATYZ2xTgZnDsM5erypKvqU 4pqyYYSG8Kz1aEWcvJOvv1ZTx/aXiwybCbQCkRTF7Nvkef/6sCaKMVppx2vtJ2G0KumYxRcMklI DpB8a+8jAkBDOJkmuXcr8k1b15TRDEHg= X-Gm-Gg: ASbGncv/JDUE4fP+E6YgdCYan0rT0h5a3HewoMxDcz5SAbg+3digFezmwwb06xcorxy 5AoSMSl0cX8FeMqXS0EaGCiJ4COvLUX/0gH2E5ixTXDUavieQoh3yAu5OC1i7oOZ71sVSCTqM1v V7prjVCQEzoJF0mN7MnjnlZrlL3jx3wAGJrVajhHccxm6+fg1yRjR4Ic4q11DSKNKxZ/qeVDfyZ jXo3mUYyYxuBlvPbcLEaJiBR0WgqYmgtyQ2nV0= X-Google-Smtp-Source: AGHT+IGHRCLfjOD2L6BejNIKAD4JEc1ovYQN21gqMF+/P6Nk8qlL2DGNN4E6/FVAzFP+Uz1Tpj0H8HRghztwtBeMZ2Q= X-Received: by 2002:a05:6820:210:b0:613:bfa6:2130 with SMTP id 006d021491bc7-613e6055d58mr9344277eaf.8.1752520142151; Mon, 14 Jul 2025 12:09:02 -0700 (PDT) MIME-Version: 1.0 References: <13e3100fc7c7d14919c37943dcfd76b263cecce2.camel@cybertec.at> <609925.1752502040@sss.pgh.pa.us> <20250714182016.23ypyxgtq6vbgl4c@hjp.at> <708241.1752517845@sss.pgh.pa.us> In-Reply-To: From: "David G. Johnston" Date: Mon, 14 Jul 2025 12:08:26 -0700 X-Gm-Features: Ac12FXywB-EyR6oWlNLCEBhDjYRCCnM6JJMk-xE46fvgrx423MdVNamrRBiuF3g Message-ID: Subject: Re: Bypassing Directory Ownership Check in PostgreSQL 16.6 with Secure z/OS NFS (AT-TLS) To: Benjamin Wang Cc: Tom Lane , "Peter J. Holzer" , pgsql-general@lists.postgresql.org Content-Type: multipart/alternative; boundary="00000000000088e5b30639e86427" List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --00000000000088e5b30639e86427 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, Jul 14, 2025 at 12:02=E2=80=AFPM Benjamin Wang wrote: > I am not sure whether PostgreSQL depends on system call `fsyncdata` to > sync data to disk. > https://www.postgresql.org/docs/current/runtime-config-wal.html#GUC-WAL-SYN= C-METHOD David J. --00000000000088e5b30639e86427 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On Mon, Jul 14, 2025 at 12:02=E2=80=AFPM Benjamin Wang <= ;benjamin.ahrtr@gmail.com&g= t; wrote:
I am n= ot sure whether PostgreSQL depends on system call `fsyncdata` to
=C2=A0= sync data to disk.

https://www.postgresql.org/docs/current/runtime-config-wal.html#GUC-= WAL-SYNC-METHOD

David J.

<= /div> --00000000000088e5b30639e86427--