On 2017-09-27 13:14, Rafa Griman wrote:
Hola :)
2017-09-26 21:02 GMT+03:00 Carlos E. R. <>:
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Ya hice la migración en el equipo de sobremesa. Una pequeña desilusión:
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Acabo de ver esto y me he acordado de ti:
https://www.phoronix.com/scan.php?page=article&item=linux414-bcache-raid&num=2
No te desilusiones mucho. Ya sabes que dependiendo del fabricante y la tecnologia del SSD (MLC SLC), el rendimiento varia. En el link que he puesto se puede ver que algunas veces vence Samsung y otras el Toshiba.
Estuve estudiando usar bcache, pero lo descarté. Es un proyecto parado, por lo que he visto: https://lists.opensuse.org/opensuse-factory/2016-07/msg00062.html Johannes Thumshirn <...@suse.de> says: Please be aware that bcache is not actively maintained by it's original author any more and thus marked as or 'Orphan' in the linux kernel's MAINTAINERS file. It also does not have the stability one might expect from it and as it's orphaned it's kind of hard to get fixes back into the kernel. Martin Wilck <...@suse.com> commented: dmcache should be usable on tumbleweed. https://info.varnish-software.com/blog/accelerating-your-hdd-dm-cache-or-bca... Pero no en Leap. Y es complicado de usar, tres particiones por cada una. jdd probó bcache, y aparentemente no quedó muy contento, creo que revirtió los cambios, vi un correo acerca de eso. Performance Comparison among EnhanceIO, bcache and dm-cache. http://lkml.iu.edu/hypermail/linux/kernel/1306.1/01246.html Leyendo esa lista, dm-cache no parece fácil de configurar, encima. Wikipedia dice uno necesita: In dm-cache, creating a mapped virtual block device that acts as a hybrid volume requires three physical storage devices:[6] Origin device – provides slow primary storage (usually an HDD) Cache device – provides a fast cache (usually an SSD) Metadata device – records the placement of blocks and their dirty flags, as well as other internal data required by a cache policy, including per-block hit counts; a metadata device cannot be shared between multiple cache devices, and it is recommended to be mirrored Nadie ha comentado recientemente en las listas (búsqueda local) acerca de usar dm-cache, y es posible que Leap no lo soporte. EnhanceIO parecía prometedor, sobre todo uno de los forks, porque no necesitaba volver a formatear: pero es otro proyecto abandonado. Wikipedia: bcache – a Linux kernel's block layer cache, developed by Kent Overstreet Flashcache – a disk cache component for the Linux kernel, initially developed by Facebook Hybrid drive – a storage device that combines flash-based and spinning magnetic media storage technologies ReadyBoost – a disk caching software component of Windows Vista and later Microsoft operating systems Smart Response Technology (SRT) – a proprietary disk storage caching mechanism, developed by Intel for its chipsets veamos flashcache: https://en.wikipedia.org/wiki/Flashcache «Since January 2013, there is a fork of Flashcache, named EnhanceIO and developed by sTec, Inc.» Not much to read there about actual implementation. https://en.wikipedia.org/wiki/EnhanceIO «Overview» «EnhanceIO makes it possible to add a SSD or other fast disk device as a cache to another block device, such as a hard drive, in order to improve the performance of the disk. It was initially based on Facebook's similar Flashcache module.[1] Unlike Flashcache and other caching solutions, it doesn't use the Linux device mapper[1]. This means it does not create a new block device and caching can be added to existing disks, without reformatting or even unmounting them. This makes it easy to add cache to existing systems.» Me gusta. Proyecto abandonado, varios forks. Nada en nuestros archivos. Nada que hacer... Sigh. Más comentarios: https://www.reddit.com/r/DataHoarder/comments/50h9zs/linux_ssd_cacheing_of_s... Ver los comentarios en esa página... :.-( Nada de tecnología "*cache" para mí, entonces. Sigamos tradicionales ;-) -- Cheers / Saludos, Carlos E. R. (from 42.2 x86_64 "Malachite" at Telcontar)