比 TLC 更不可靠的 QLC 要來了? - 3C

By Freda
at 2016-08-11T18:55
at 2016-08-11T18:55
Table of Contents
目前 SSD 的主流已經是被 TLC 所佔據,畢竟便宜廠商愛,在大容量上有優勢,
但可靠度低是主要缺點,不過 QLC 的產品如果推出,TLC 應該就會變成"還不錯"?
在日前的 FMS 國際快閃記憶體會議上,
Facebook 分享了他們對數據儲存的一些觀點,上圖中列舉了四種不同類型的儲存方式,
包括 NVM 非易失性儲存器、AVA(四塊 M2.22110 組成) 、Lightning 及 WORM,
最後的這個WORM代表 Write Once Read Many(寫入一次、讀取多次),
也就是說這種儲存設備對寫入壽命要求不高,讀取應用比較多。
根據 Pcper 網站所說,這個 WORM 儲存使用的就是 QLC 快閃記憶體,
我們知道 TLC 快閃記憶體指的是每個Cell單元儲存3位數據,有8個電位變化,
那麼 QLC 就是每單元儲存4位數據,有16個電位變化,一方面這意味著 QLC 快閃記憶體
的容量更大,
但也意味著 QLC 快閃記憶體的電壓控制更難,寫入速度更低,可靠性要求更高。
WORM 儲存的容量可達100TB,差不多是目前 TLC 快閃記憶體硬碟最高容量的10倍,
它的寫入次數也降低到了150次左右,也相當於目前 TLC 快閃記憶體的1/10。
此外,Facebook 現場還分享了 Intel Optance 硬碟的性能,
該硬碟基於 Intel、美光的 3D XPoint 快閃記憶體,在 RocksDB 性能測試中,
來源:http://www.expreview.com/48772.html
CBB 編譯
http://www.coolaler.com/showthread.php/338517
TLC的時代已過
QLC 的時代來臨
你不能不要
--
但可靠度低是主要缺點,不過 QLC 的產品如果推出,TLC 應該就會變成"還不錯"?
在日前的 FMS 國際快閃記憶體會議上,
Facebook 分享了他們對數據儲存的一些觀點,上圖中列舉了四種不同類型的儲存方式,
包括 NVM 非易失性儲存器、AVA(四塊 M2.22110 組成) 、Lightning 及 WORM,
最後的這個WORM代表 Write Once Read Many(寫入一次、讀取多次),
也就是說這種儲存設備對寫入壽命要求不高,讀取應用比較多。
根據 Pcper 網站所說,這個 WORM 儲存使用的就是 QLC 快閃記憶體,
我們知道 TLC 快閃記憶體指的是每個Cell單元儲存3位數據,有8個電位變化,
那麼 QLC 就是每單元儲存4位數據,有16個電位變化,一方面這意味著 QLC 快閃記憶體
的容量更大,
但也意味著 QLC 快閃記憶體的電壓控制更難,寫入速度更低,可靠性要求更高。
WORM 儲存的容量可達100TB,差不多是目前 TLC 快閃記憶體硬碟最高容量的10倍,
它的寫入次數也降低到了150次左右,也相當於目前 TLC 快閃記憶體的1/10。
此外,Facebook 現場還分享了 Intel Optance 硬碟的性能,
該硬碟基於 Intel、美光的 3D XPoint 快閃記憶體,在 RocksDB 性能測試中,
來源:http://www.expreview.com/48772.html
CBB 編譯
http://www.coolaler.com/showthread.php/338517
TLC的時代已過
QLC 的時代來臨
你不能不要
--
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3C
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