Los sistemas de almacenamiento enterprise no suelen facilitar la recolección de datos para medir el rendimiento de los distintos subsistemas a través de protocolos abiertos, por ejemplo mediante consultas SNMP. Si un sistema necesita ser monitorizado para abordar un problema de rendimiento, realizar un estudio de utilización o la obtención de datos para un plan de capacidad, deberá adquirir un producto licenciado aparte, como Tuning Manager en el caso de sistemas Hitachi.
-Fig1.Esquema interno de Hitachi VSP-
Para los modelos de cabinas Hitachi 9900V / USP / NSC55 / USP-V / USP-VM / VSP existe una alternativa: Export Tool – ésta herramienta va incluida en el CD que contiene el microcódigo instalado en la cabina, de forma que cada versión de microcódigo tiene su versión específica-. Se trata de una aplicación java (multiplataforma) que se ejecuta desde la línea de comandos desde un equipo con conectividad LAN con la SVP de la cabina y que obtiene los estadísticas de rendimiento en ficheros con formato CSV. El hecho de que no disponga de una interfaz gráfica, que su configuración no sea trivial, junto con que esté casi escondida entre los CDs de soporte hace que no sea demasiado utilizada por administradores.
Todo lo que se observa desde Perfomance Monitor – elemento de la herramienta de administración Storage Navigator incluida entre el conjunto de herramientas básicas de gestión (Hitachi Basic Operating System)-, puede ser almacenado en ficheros csv mediante Export Tool. Performance Monitor proporciona detalles en profundidad del rendimiento de todos los elementos del sistema, incluyendo discos, volúmenes, procesadores, cache, puertos, etc. Incluso permite monitorizar el estado de copias remotas y locales de Mainframe y Open. Es la herramienta de troubleshooting y análisis esencial para la resolución de problemas de rendimiento en sistemas Hitachi 9900V / USP / NSC55 / USP-V / USP-VM / VSP. Su uso es bajo demanda y no permite monitorizar y generar alertas en modo desatendido.
Usando Performance Monitor y Export Tool
El primer paso es habilitar la recolección de estadísticas desde la pestaña de Performance Monitor (PM) en Storage Navigator. PM dispone dos tipos de rangos para recoger y almacenar estadísticas del sistema:
– short range: Permite definir un intervalo de entre cada toma de datos (entre 1 y 15 min) y guarda 1440 muestras.
– long range: Recolecta datos al intervalo fijo de 15 min entre cada adquisición y los almacena durante 3 meses.
La instalación de Export Tool es tan sencilla como descomprimir un paquete en un directorio. El programa java lee el archivo de configuración “command.txt”. Sobre este fichero se definen los elementos sobre los que se quiere extraer información y el subconjunto de tiempo, si no se quiere disponer de todos los valores almacenados. Además existen otros modificadores para presentar la información comprimida, decidir si se sobreescribe en el directorio de salida, etc.
Los tipos de valores se guardan organizados en formato csv son:
– Valores relativos : Tasa de utilización del recurso (en %). Obtenidos mediante un cálculo interno. Los archivos con estos datos tienen el prefijo "Phy" (PHYSICAL).
– Valores absolutos : Contienen valores medidos en el recurso durante el intervalo especificado (IO/sec, KB/sec, …)
Para los valores relativos existe una regla práctica (publicada en el portal de soporte de HDS) definiendo los umbrales de utilización aconsejados :
– Front end CHP utilization should be less than 70%.
– Back end DKP utilization should be less than 50%.
– Write Pending should average less than 30%.
– Array Group utilization should be less than 50%.
– LDEV utilization depends on the response time requirements of the application. To provide good response times, utilization should be below 50%.
A partir de aquí pueden definirse alertas sobre elementos según estos umbrales y realizar una redistribución de recursos en el sistema de almacenamiento para equilibrarlos, por ejemplo para un distribución de los puertos de fibra entre los hosts con mayor actividad o distribuir volúmenes en parity groups menos utilizados.
Los valores absolutos permiten representar “los números” de nuestro sistema de almacenamiento: IO/sec, KB/sec y representar gráficamente de forma sencilla el comportamiento de sistemas y aplicaciones a lo largo de un periodo de tiempo, por ejemplo las últimas 24h o la evolución de la carga semanal.
Recoger estos valores de forma periódica permite disponer fácilmente de la evolución del uso del almacenamiento en el tiempo, comparando estadísticas entre meses, años, etc. A partir de aquí, la imaginación y la destreza de cada uno para manejar este tipo de archivos y su representación gráfica o la integración con otras herramientas (splunk, nagios, pnp4nagios, …) marcan el límite.
About Jose Luis Viñas
10+ years experienced IT systems engineer (5+ working in critical environments). Strong background delivering quality and reliable services based on client needs and providing rapid responses to user requests. Focus on UNIX systems, storage infrastructure and backup systems.
- Web |
- More Posts(2)
Your mode of explaining all in this post
is truly good, every one be able to effortlessly be aware of it,
Thanks a lot.
Useful info. Fortunate me I discovered your website
by chance, and I am stunned why this coincidence didn’t happened
in advance! I bookmarked it.
This is the right blog for anybody who really wants to find out
about this topic. You realize so much its almost
tough to argue with you (not that I actually will need to…HaHa).
You certainly put a new spin on a topic which has been written about for a long time.
Excellent stuff, just excellent!
Hi there I am so excited I found your blog page, I really found
you by mistake, while I was searching on Bing for something else,
Anyways I am here now and would just like to say many thanks for a fantastic
post and a all round exciting blog (I also love the theme/design), I don’t have time to go through it all at the moment but I
have bookmarked it and also included your RSS feeds, so when I have time I
will be back to read more, Please do keep up the great b.
Thank you for the good writeup. It in fact was a amusement account it.
Look advanced to more added agreeable from you! By the way,
how can we communicate?
If you want to take a good deal from this article then you have
to apply such methods to your won web site.
If you desire to take a good deal from this article then you have to apply
such strategies to your won website.
I must thank you for the efforts you’ve put in writing this blog.
I am hoping to see the same high-grade content from you later on as well.
In fact, your creative writing abilities has encouraged me to
get my own site now 😉
It’s a pity you don’t have a donate button! I’d definitely donate to this brilliant blog!
I guess for now i’ll settle for book-marking and adding your RSS feed to my Google account.
I look forward to fresh updates and will talk about this
website with my Facebook group. Talk soon!
Right away I am ready to do my breakfast, later than having
my breakfast coming yet again to read additional news.
Terrific article! This is the type of information that are meant to be shared around the internet.
Disgrace on Google for no longer positioning this publish higher!
Come on over and visit my site . Thank you =)
Howdy, I do believe your site may be having browser
compatibility problems. Whenever I take a look at your website
in Safari, it looks fine however, if opening in IE, it has some overlapping issues.
I merely wanted to give you a quick heads up!
Besides that, wonderful site!
bookmarked!!, I like your website!
That is a very good tip particularly to those new to
the blogosphere. Simple but very accurate
info… Thank you for sharing this one. A must read post!
I am not sure where you are getting your information,
but good topic. I needs to spend some time learning much more or understanding more.
Thanks for great information I was looking for this information for my mission.
I truly love your website.. Pleasant colors & theme. Did you
develop this site yourself? Please reply back as I’m attempting to create my very own website and would love to learn where you got this
from or just what the theme is called. Many thanks!
Wow, marvelous blog layout! How lengthy have you been running a blog for?
you make blogging look easy. The entire glance of your website is fantastic, let alone the content!
Hello my loved one! I wish to say that this article
is awesome, nice written and come with almost all vital infos.
I’d like to peer more posts like this .
Appreciate the recommendation. Will try it out.
Helpful info. Lucky me I discovered your website unintentionally,
and I’m surprised why this accident didn’t took place earlier!
I bookmarked it.
I have read a few good stuff here. Definitely worth bookmarking for revisiting.
I wonder how so much effort you place to create this kind of excellent
informative web site.
Excellent web site you have here.. It’s difficult to find good quality writing like
yours nowadays. I really appreciate people like you!
Take care!!
Hello just wanted to give you a brief heads up and let you know a few
of the images aren’t loading properly. I’m not sure why but I think its a linking issue.
I’ve tried it in two different web browsers and both show the same outcome.
I am extremely impressed with your writing skills and also with the
layout on your weblog. Is this a paid theme or did you customize it yourself?
Either way keep up the nice quality writing,
it’s rare to see a great blog like this one nowadays.
Thank you for sharing your thoughts. I really appreciate your
efforts and I am waiting for your next post thank
you once again.
Excellent blog here! Also your site loads up fast!
What web host are you using? Can I get your affiliate link to your host?
I wish my web site loaded up as quickly
as yours lol
Hello there, just became alert to your blog through Google,
and found that it is truly informative. I am gonna watch out for brussels.
I’ll appreciate if you continue this in future. Numerous people
will be benefited from your writing. Cheers!
I’ll immediately clutch your rss feed as I can not to find
your email subscription hyperlink or e-newsletter service.
Do you’ve any? Please allow me understand so that I could subscribe.
Thanks.
Thank you for the auspicious writeup. It in fact was a amusement account it.
Look advanced to more added agreeable from you! However,
how can we communicate?
First of all I want to say awesome blog! I had
a quick question that I’d like to ask if you don’t mind.
I was interested to find out how you center yourself and
clear your head prior to writing. I’ve had a hard time clearing my mind in getting my thoughts out there.
I truly do take pleasure in writing but it just seems like the first 10 to 15 minutes
tend to be wasted simply just trying to figure out
how to begin. Any ideas or hints? Appreciate it!
You’ve made some really good points there. I checked on the internet to find out more about the issue and found most
individuals will go along with your views on this website.
I don’t know if it’s just me or if everybody else encountering issues with
your blog. It appears like some of the written text within your content are running off the screen. Can somebody else please provide feedback and let me know if this is happening to them too?
This could be a issue with my browser because I’ve had
this happen previously. Many thanks
Hey! Someone in my Facebook group shared this site with us so I came to give it a look.
I’m definitely loving the information. I’m bookmarking and will
be tweeting this to my followers! Excellent blog and fantastic design and style.
Fantastic site you have here but I was wanting to know
if you knew of any forums that cover the same topics discussed here?
I’d really love to be a part of group where I can get advice from other knowledgeable
people that share the same interest. If you have any recommendations, please let me know.
Thanks a lot!
It’s perfect time to make a few plans for the long
run and it is time to be happy. I’ve learn this post
and if I may just I desire to counsel you few fascinating issues or tips.
Perhaps you can write subsequent articles relating to this article.
I wish to read even more things approximately it!
Right here is the perfect blog for anyone who wishes to understand
this topic. You understand a whole lot its almost tough to argue with you (not that
I really will need to…HaHa). You certainly put a fresh
spin on a subject that has been discussed for years.
Great stuff, just great!
I believe that is among the such a lot significant information for me.
And i am happy reading your article. However wanna commentary on some common things,
The website style is perfect, the articles is in reality nice
: D. Just right process, cheers
I was suggested this web site by my cousin. I’m
not sure whether this post is written by him as no one else know such detailed
about my difficulty. You’re incredible! Thanks!
Thanks for one’s marvelous posting! I truly enjoyed reading
it, you’re a great author. I will be sure to bookmark your blog and definitely will come back in the future.
I want to encourage you to continue your great work, have a nice holiday weekend!
I constantly spent my half an hour to read this webpage’s content every day along
with a mug of coffee.
Link exchange is nothing else but it is simply placing the other person’s weblog link
on your page at suitable place and other person will also do similar for you.
Howdy, I do think your web site may be having web browser compatibility issues.
Whenever I take a look at your site in Safari, it looks fine however when opening in IE,
it’s got some overlapping issues. I simply wanted to provide you with a quick heads
up! Other than that, fantastic site!
you’re really a just right webmaster. The web site loading pace
is amazing. It seems that you are doing any distinctive trick.
In addition, The contents are masterpiece. you’ve done a magnificent process on this subject!
you’re really a just right webmaster. The web site loading pace
is amazing. It seems that you are doing any distinctive trick.
In addition, The contents are masterpiece. you’ve done a magnificent process on this subject!
This piece of writing will help the internet people for building up new web site or even a
blog from start to end.
I’ve been browsing on-line more than 3 hours today, but I
never discovered any fascinating article like yours. It is pretty worth enough for me.
In my view, if all webmasters and bloggers made good content as you did, the internet might be much more helpful than ever before.
What’s up, I want to subscribe for this weblog to obtain newest updates,
therefore where can i do it please help.
Hi there, just wanted to say, I liked this post. It was practical.
Keep on posting!
I have been browsing online more than 3 hours today, yet I never found any interesting article like yours.
It’s pretty worth enough for me. Personally, if all website owners and bloggers made good content as
you did, the net will be a lot more useful than ever before.
Greetings from Florida! I’m bored to death at work so I
decided to browse your blog on my iphone during lunch break.
I really like the info you present here and can’t wait to take a look when I get home.
I’m surprised at how quick your blog loaded on my phone ..
I’m not even using WIFI, just 3G .. Anyways, awesome blog!