From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.thelounge.net (mail.thelounge.net [91.118.73.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77A5015383E for ; Tue, 11 Jun 2024 23:23:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.118.73.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718148195; cv=none; b=TNULgfwoDLhI0Cp8pveH87dxqWQVSbreCCEjoG2VCeZyfatOCQyEp2ES9nTx8mriz8ZGpS4RuupYaf25J/u2UxbHOIaucVRJg9NWqeQ1WKDB74PwijLlFdR5xh477ZyaXzpL6nPwF8o8cFX1FVW5tkVN1ffpivIi4ke2zATRH8c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718148195; c=relaxed/simple; bh=Lmj1vxoMj+D3Gv8EoLEuZheMEx78kjrdrLaIVKSFrEY=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=gle8gGlJh23VWPYnmtwNmuTryJcWiI+fa2RMkoFt4ZnAFpoI2jt4i/FkvZyp0QP4nEsWEj+2c0BbLYa/vrIYDNEPVhyxwEeX/C2skD9CKg8iL2gjUOplwwME3qr4HWmGQRrqjWG2aJLWGBW6yny910abjBrZriouFIJtPd2on6A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=thelounge.net; spf=pass smtp.mailfrom=thelounge.net; arc=none smtp.client-ip=91.118.73.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=thelounge.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=thelounge.net Received: from [10.10.10.2] (rh.vpn.thelounge.net [10.10.10.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) (Authenticated sender: h.reindl@thelounge.net) by mail.thelounge.net (THELOUNGE MTA) with ESMTPSA id 4VzPPZ6X95zXKn; Wed, 12 Jun 2024 01:04:18 +0200 (CEST) Message-ID: Date: Wed, 12 Jun 2024 01:04:18 +0200 Precedence: bulk X-Mailing-List: linux-raid@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: RAID-10 near vs. RAID-1 Content-Language: en-US To: Piergiorgio Sartor , linux-raid@vger.kernel.org References: From: Reindl Harald Autocrypt: addr=h.reindl@thelounge.net; keydata= xsDNBFq9ahEBDADEQKxJxY4WUy7Ukg6JbzwAUI+VQYpnRuFKLIvcU+2x8zzf8cLaPUiNhJKN 3fD8fhCc2+nEcSVwLDMoVZfsg3BKM/uE/d2XNb3K4s13g3ggSYW9PCeOrbcRwuIvK5gsUqbj vXSAOcrR7gz/zD6wTYSNnaj+VO4gsoeCzBkjy9RQlHBfW+bkW3coDCK7DocqmSRTNRYrkZNR P1HJBUvK3YOSawbeEa8+l7EbHiW+sdlc79qi8dkHavn/OqiNJQErQQaS9FGR7pA5SvMvG5Wq 22I8Ny00RPhUOMbcNTOIGUY/ZP8KPm5mPfa9TxrJXavpGL2S1DE/q5t4iJb4GfsEMVCNCw9E 6TaW7x6t1885YF/IZITaOzrROfxapsi/as+aXrJDuUq09yBCimg19mXurnjiYlJmI6B0x7S9 wjCGP+aZqhqW9ghirM82U/CVeBQx7afi29y6bogjl6eBP7Z3ZNmwRBC3H23FcoloJMXokUm3 p2DiTcs2XViKlks6Co/TqFEAEQEAAc0mUmVpbmRsIEhhcmFsZCA8aC5yZWluZGxAdGhlbG91 bmdlLm5ldD7CwREEEwEIADsCGyMFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AWIQSdK0bNvBQK NnU65NczF01aWJK3uAUCWr1qowIZAQAKCRAzF01aWJK3uEznDACGncwi0KfKOltOBmzIQNIn 7kPOBFU8KGIjONpg/5r82zwDEpFOTKw+hCttokV6+9K+j8Iut0u9o7iSQNA70cXqkaqPndxB uRIi/L6nm2ZlUMvQj9QD5U+mdTtSQH5WrC5lo2RYT2sTWoAFQ6CSnxxJd9Ud7rjbDy7GRnwv IRMfFJZtTf6HAKj8dZecwnBaHqgZQgRAhdsUtH8ejDsWlfxW1Qp3+Vq008OE3XXOFQX5qXWK MESOnTtGMq1mU/Pesmyp0+z58l6HyUmcoWruyAmjX7yGQPOT5APg2LFpMHA6LIu40mbb/pfg 5am8LWLBXQRCP1D/XLOuQ5DO6mWY0rtQ8ztZ5Wihi5qA9QKcJxmZcdmurlaxi3mavR3VgCIc 3hDPcvUqBwB5boNZspowYoHQ21g9qyFHOyeS69SNYhsHPCTr6+mSyn+p4ou4JTKiDRR16q5X hHfXO9Ao9zvVVhuw+P4YySmTRRlgJtcneniH8CBbr9PsjzhVcX2RkOCC+ObOwM0EWr1qEQEM ANIkbSUr1zk5kE8aXQgt4NFRfkngeDLrvxEgaiTZp93oSkd7mYDVBE3bA4g4tng2WPQL+vnb 371eaROa+C7/6CNYJorBx79l+J5qZGXiW56btJEIER0R5yuxIZ9CH+qyO1X47z8chbHHuWrZ bTyq4eDrF7dTnEKIHFH9wF15yfKuiSuUg4I2Gdk9eg4vv9Eyy/RypBPDrjoQmfsKJjKN81Hy AP6hP9hXL4Wd68VBFBpFCb+5diP+CKo+3xSZr4YUNr3AKFt/19j2jJ8LWqt0Gyf87rUIzAN8 TgLKITW8kH8J1hiy/ofOyMH1AgBJNky1YHPZU3z1FWgqeTCwlCiPd6cQfuTXrIFP1dHciLpj 8haE7f2d4mIHPEFcUXTL0R6J1G++7/EDxDArUJ9oUYygVLQ0/LnCPWMwh7xst8ER994l9li3 PA9k9zZ3OYmcmB7iqIB+R7Z8gLbqjS+JMeyqKuWzU5tvV9H3LbOw86r2IRJp3J7XxaXigJJY 7HoOBA8NwQARAQABwsD2BBgBCAAgFiEEnStGzbwUCjZ1OuTXMxdNWliSt7gFAlq9ahECGwwA CgkQMxdNWliSt7hVMwwAmzm7mHYGuChRV3hbI3fjzH+S6+QtiAH0uPrApvTozu8u72pcuvJW J4qyK5V/0gsFS8pwdC9dfF8FGMDbHprs6wK0rMqaDawAL8xWKvmyi6ZLsjVScA6aM307CEVr v5FJiibO+te+FkzaO9+axEjloSQ9DbJHbE3Sh7tLhpBmDQVBCzfSV7zQtsy9L3mDKJf7rW+z hqO9JA885DHHsVPPhA9mNgfRvzQJn/3fFFzqmRVf7mgBV8Wn8aepEUGAd2HzVAb3f1+TS04P +RI8qKoqeVdZlbwJD59XUDJrnetQrBEfhEd8naW8mHyEWHVJZnSTUIfPz2sneW1Zu2XkfqwV eW+IyDAcYyTXqnEGdFSEgwgzliPJDWm5CHbsU++7Kzar5d5flRgGbtcxqkpl8j0N0BUlN4fA cTqn2HJNlhMSV0ZocQ0888Zaq2S5totXr7yuiDzwrp70m9bJY+VPDjaUtWruf2Yiez3EAhtU K4rYsjPimkSIVdrNM//wVKdCTbO+ Organization: the lounge interactive design In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Am 11.06.24 um 20:31 schrieb Piergiorgio Sartor: > I'm setting up a system with 2 SSD M.2 (NVME). > > I was wondering if would it be better, performace > wise, to have a RAID-10 near layout or a RAID-1. > > Looking around I found only one benchmark: > > https://strugglers.net/~andy/blog/2019/06/02/exploring-different-linux-raid-10-layouts-with-unbalanced-devices/ > > Which uses mixed SSD, NVME and SATA. > > Does anybody have any suggestions, links, or > ideas on the topic? > > BTW, practically speaking, what's the difference, > between the two RAIDs? i wouldn't even consider a RAID10 with two disks, especially with SSD and practically you end with a unsupported RAID1 because there are no stripes with 2 disks